When something extremely unexpected happens, and bystanders cover their mouths with a clenched, balled fist with the thumb side toward the mouth, thus mimicking the motion of grasping the primary male reproductive organ and inserting said organ into ones mouth.
This is usually accompanied by a long, drawn out "Daaaaaaaaaaamn" to further express surprise.
Andrew: Hey Neil, I fucked your mom last night for real. Here, check the pics and vids on my phone.

Jeff: Daaaaaaaaaaaaamn (slowly covering mouth with thumb side of clenched fist)... Neil your mom's a sick bitch!

Neil: Whatever, I've got some of me and Andrew's mom on my phone, see?

Jeff: Daaaaaaaaaaaaamn (slowly covering mouth with thumb side of clenched fist again)...

Andrew: Enough of that Dick Suck Crazy bullshit, learn a new reaction.
by RECLA1M3R October 23, 2011
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