_|\__\o/_

SHARK ATTACK!
that's the definiton lol idk what else to say
FOR NOOBS:

__ -water
|\ -shark's flipper
\o/ -'\ /' are hands and 'o' is head shouting for help
i've seen it first time while playing hon (heroes of newerth)

player1: host is afk..
p2: aaah -.-`
p3: -.-``````
p4: omfg tell him to stop jerking off and come start the game xd
p2: *.*
p3: ''.''
*a short moment of silence*
p5: _|\__\o/_ SHARK ATTACK!
p1: xD
p2: hahaha
*etc etc etc*