Where your not supposed to look at porn on a computer but you log into a porn site for a few seconds to get a peek of tits,cunt etc. and then click it off before anyone sees you.
by Judge dredd7 December 25, 2011

The instant where a man's penis become erect unprovoked. In other words, a random split second boner.
"I was sitting in class today and had a bone flash, it was so bad that I couldn't get up and walk around without being noticed. "
Or
Bob: "I just had a bone flash."
John: "WTF? Theres no girls in here."
Bob: "I know. Either its a bone flash or I'm gay."
-silence
Bob:
Or
Bob: "I just had a bone flash."
John: "WTF? Theres no girls in here."
Bob: "I know. Either its a bone flash or I'm gay."
-silence
Bob:
by Dr. McAwesomeBerg October 25, 2009

by Sp1tf1re October 22, 2011

When you take a flash photo of someone while they are sleeping right before or after someone farted so they wake up to a fart sound and/or smell
She's giving you that look that Tony had on his face after I flash farted him and he yawn-gagged. It's like you're her nightmare in smell form.
by Jestah November 18, 2016

When the stream to a flash or other player doesn't supply enough valid data so the player runs, freezes, runs, freezes. Also called breakup, bad connection, corrupted data.
by knowman April 27, 2008

When having sex; to pull out and catch the semen with your hand and slap the female in the face, before she can react.
by FlashSlapper October 20, 2012

A spontaneous and unscheduled meeting with way more people than need to be there. These meetings are generally unorganized.
by SLeepdepD September 29, 2011
