When you either accidentally or deliberately to be ironic type "
smile" with your right hand on the
wrong keys.
Originated in text-
based MUDs in the 90s where users would type commands into the console to "emote."
Example 1.
Person 1: I love you so much, dearest.
Person 2: Sweet! *SNUKE*
Example 2.
"say I just slayed that level 50
dragon!"
You say: I just slayed that level 50
dragon!
"Hrothgar: snuke"
Hrothgar tries to type "
smile" but his hands are on the wrong keys!