look up any word, like dirty sanchez:
 
2.
Its when you're getting head and you cum in her mouth without any prior warning.
I was getting head and came in this girl's mouth without making a sound. She said "What the hell" and I yelled

"Pop goes the weasel bitch!!"
by Swarjin October 08, 2009
 
1.
In a game of Whack-A-Weasel there are a couple of holes from which weasels pop their heads out randomly.

Your goal is to smack a weasels head with a hammer in order to push it back to its hole.

You have to consider, that hitting a weasel with a hammer in the face is not quite a challenge and of course humiliating for the poor animal.

The phrase "Pop! Goes the weasel." in terms of conflict resolution describes the effortless humiliation of another person.

The phrase does not refer to a fight being fair or not.

You could use this phrase to comment a situation in which you owned.
Casey get's into an fight with Josh. Now it seems that Josh has quite an unfair advantage because of his upper body strength and nutrition. Yet as Case lands a powerful kick in his ball sack, Josh collapses and cries like a baby. Casey comments : "pop goes the weasel"

(Well, not because she whacked his weasel but because it was quite effortless, you know.)
by S.Sinclair August 04, 2013