Top Definition
1. a exclamation made(usually in an English accent) when accusing someone of not being truthful.

2. a discription of an event that is unpleasant

Origins from Big Pine Camp Grounds 2012
1. "I was going to text you what campsite we were at, but we didn't get service that deep in the forest"
"That's CockyPop! You just wanted the marshmallows all to yourselves!"

2. "CockyPop! The sausage fell through the grill"
by JennB August 07, 2012
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