Definitions by Boobert Goobert

cousin pumper 

A cousin pumper is a person who fucks their cousin. Typically these people originate from southern United States.

Bill: "dude did Brandon tell you about that chick Tia he banged last week?"
John: "Tia is his cousin, man..."
Bill: "gross that guy is a cousin pumper?!"

cousin pumper by Boobert Goobert September 27, 2017