When you're in the cinema and you put your dick in the bottom of the popcorn box, and have a wank as if to look like you're rummaging through the popcorn.
"What's all that noise, I can't hear the film?!"
"I don't know, must be someone having a popcorn wank!"
"I don't know, must be someone having a popcorn wank!"
by Bambamg123 December 16, 2016
Get the Popcorn wankmug.