Unicode emoticons for Compose key

.XCompose

# Emoji
# http://unicode.org/emoji/charts/full-emoji-list.html

<Multi_key> <e> <m> <o> <colon> <D>              : "😀"
<Multi_key> <e> <m> <o> <x> <D>                  : "😁"
<Multi_key> <e> <m> <o> <x> <apostrophe> <D>     : "😂"
<Multi_key> <e> <m> <o> <colon> <apostrophe> <D> : "😂"
<Multi_key> <e> <m> <o> <r> <o> <f> <l>          : "🤣"
<Multi_key> <e> <m> <o> <colon> <d>              : "😃"
<Multi_key> <e> <m> <o> <x> <parenright>         : "😄"
<Multi_key> <e> <m> <o> <apostrophe> <x> <parenright>      : "😅"
<Multi_key> <e> <m> <o> <X> <parenright>                   : "😆"
<Multi_key> <e> <m> <o> <semicolon> <parenright>           : "😉"
<Multi_key> <e> <m> <o> <colon> <asterisk>    <parenright> : "😊"
<Multi_key> <e> <m> <o> <colon> <KP_Multiply> <parenright> : "😊"
<Multi_key> <e> <m> <o> <colon> <p>                        : "😋"
<Multi_key> <e> <m> <o> <B> <parenright>                   : "😎"
<Multi_key> <e> <m> <o> <colon> <less> <3>                 : "😍"
<Multi_key> <e> <m> <o> <semicolon> <asterisk>             : "😘"
<Multi_key> <e> <m> <o> <semicolon> <KP_Multiply>          : "😘"
<Multi_key> <e> <m> <o> <colon> <asterisk>                 : "😗"
<Multi_key> <e> <m> <o> <colon> <KP_Multiply>              : "😗"
<Multi_key> <e> <m> <o> <x> <asterisk>    <space>          : "😙"
<Multi_key> <e> <m> <o> <x> <KP_Multiply> <space>          : "😙"
<Multi_key> <e> <m> <o> <x> <asterisk>    <asterisk>       : "😚"
<Multi_key> <e> <m> <o> <x> <KP_Multiply> <KP_Multiply>    : "😚"
#no symbol for ☺ as it looks almost exactly like 😊
<Multi_key> <e> <m> <o> <colon> <parenright>     : "🙂"
<Multi_key> <e> <m> <o> <h> <u> <g>              : "🤗"
<Multi_key> <e> <m> <o> <t> <h> <i> <n> <k>      : "🤔"
<Multi_key> <e> <m> <o> <colon> <bar>            : "😐"
<Multi_key> <e> <m> <o> <x> <bar>                : "😑"
<Multi_key> <e> <m> <o> <colon> <space>          : "😶"
<Multi_key> <e> <m> <o> <colon> <Up>             : "🙄"
<Multi_key> <e> <m> <o> <s> <m> <i> <r> <k>      : "😏"
<Multi_key> <e> <m> <o> <colon> <Right> <parenright>: "😏"
<Multi_key> <e> <m> <o> <x> <parenleft>          : "😣"
<Multi_key> <e> <m> <o> <apostrophe> <colon> <parenleft> : "😥"
<Multi_key> <e> <m> <o> <colon> <o>              : "😮"
<Multi_key> <e> <m> <o> <colon> <numbersing>     : "🤐"
<Multi_key> <e> <m> <o> <colon> <O>              : "😯"
# missing 😪, 😫
<Multi_key> <e> <m> <o> <z> <z> <z>              : "😴"
# missing 😌
<Multi_key> <e> <m> <o> <n> <e> <r> <d>          : "🤓"
<Multi_key> <e> <m> <o> <colon> <P>              : "😛"
<Multi_key> <e> <m> <o> <semicolon> <P>          : "😜"
<Multi_key> <e> <m> <o> <x> <P>                  : "😝"
<Multi_key> <e> <m> <o> <d> <r> <o> <o> <l>      : "🤤"
<Multi_key> <e> <m> <o> <colon> <Right> <parenleft>  : "😒"
<Multi_key> <e> <m> <o> <apostrophe> <x> <parenleft> : "😓"
<Multi_key> <e> <m> <o> <colon> <Down>           : "😔"
<Multi_key> <e> <m> <o> <colon> <slash>          : "😕"
<Multi_key> <e> <m> <o> <parenleft> <colon>      : "🙃"
<Multi_key> <e> <m> <o> <colon> <$>              : "🤑"
<Multi_key> <e> <m> <o> <w> <o> <w>              : "😲"
<Multi_key> <e> <m> <o> <d> <colon>              : "☹"
<Multi_key> <e> <m> <o> <colon> <parenleft>      : "🙁"
<Multi_key> <e> <m> <o> <x> <w>                  : "😖"
# missing 😞 😟 😤
<Multi_key> <e> <m> <o> <colon> <apostrophe> <parenleft> : "😢"
<Multi_key> <e> <m> <o> <colon> <apostrophe> <apostrophe> <parenleft> : "😭"
<Multi_key> <e> <m> <o> <D> <colon>              : "😦"
# missing
<Multi_key> <e> <m> <o> <at> <at>                : "😵"
<Multi_key> <e> <m> <o> <a> <a> <n> <g> <r> <y>  : "😡"
<Multi_key> <e> <m> <o> <a> <n> <g> <r> <y>      : "😠"
# missing
<Multi_key> <e> <m> <o> <b> <o> <o>              : "👻"
<Multi_key> <e> <m> <o> <d> <e> <v> <i> <l>      : "😈"
<Multi_key> <e> <m> <o> <a> <l> <i> <e> <n>      : "👽"
<Multi_key> <e> <m> <o> <a> <a> <l> <i> <e> <n>  : "👾"
<Multi_key> <e> <m> <o> <r> <o> <b> <o> <t>      : "🤖"
<Multi_key> <e> <m> <o> <s> <h> <i> <t>          : "💩"
# missing
<Multi_key> <e> <m> <o> <f> <u> <c> <k>          : "🖕"
<Multi_key> <e> <m> <o> <p> <e> <a> <c> <e>      : "✌"
<Multi_key> <e> <m> <o> <c> <r> <s> <f> <n> <g>  : "🤞"
<Multi_key> <e> <m> <o> <s> <p> <o> <c> <k>      : "🖖"
<Multi_key> <e> <m> <o> <h> <o> <r> <n> <s>      : "🤘"
<Multi_key> <e> <m> <o> <backslash> <m> <slash>  : "🤘"
<Multi_key> <e> <m> <o> <c> <a> <l> <l>          : "🤙"
<Multi_key> <e> <m> <o> <o> <k>                  : "👌"
<Multi_key> <e> <m> <o> <parenleft> <y> <parenright> : "👍"
<Multi_key> <e> <m> <o> <parenleft> <n> <parenright> : "👎"
<Multi_key> <e> <m> <o> <parenleft> <y> <y> <y> <parenright> : "👍👍👍"
<Multi_key> <e> <m> <o> <less> <3>               : "❤"
<Multi_key> <e> <m> <o> <less> <KP_3>            : "❤"
<Multi_key> <e> <m> <o> <less> <greater>         : "♢"
<Multi_key> <e> <m> <o> <w> <o> <o>              : "🎉"

<Multi_key> <e> <m> <o> <bracketleft> <A> <bracketright>  : "🅰️"
<Multi_key> <e> <m> <o> <bracketleft> <B> <bracketright>  : "🅱️"
<Multi_key> <e> <m> <o> <bracketleft> <O> <bracketright>  : "🅾️"
<Multi_key> <e> <m> <o> <bracketleft> <A> <B> <bracketright>  : "🆎"

<Multi_key> <e> <m> <o> <b> <i> <k> <e>          : "🚴"
<Multi_key> <e> <m> <o> <b> <o> <o> <k>          : "📙"

On Debian have a look at the official wiki.

@cubimon, indeed. Inspired by some messaging clients, I substituted <e> <m> <o> with <colon>, which shortens the sequences.
My version is here.