Cock Flattener Share definition Flag (n) A extremely large female. So heavy they flatten your cock. "Man Jim, you banged a cock flattener last night." "Yeah, but at least I made sure to skeet." Cock Flattener by ill NastyNamo February 5, 2009 0 0 Get merch Get the Cock Flattener mug. Buy Now — $32.95 See more merch