a wet one - A wet one is when you do a proper stoinker and can’t hold it

A wet one is when you do a proper stoinker and can’t hold it in, usually when you’re all sweaty and your butt is lubed up like a greasy pig.

"He dropped a wet one in the shower and now the whole bathroom smells like a pigsty."

"She had a wet one so bad, her pants are now a crime scene."

"He had a wet one in the gym, and now the whole class smells like a wet sock."