Schleipman
To 'Schleipman' is someone completely unaware of there actions who shake the urine out of one's penis so violently at a open urinal that everyone else in the mens room gets very uncomfortable, avoids eye contact and believes the offender is committing public masterbation.
"Hey man, Did you see Sir Spanks a Lot having a jack attack while we were washing our hands? "
"Dude. Whoa, That Cock Knocker' pulled a Schleipman and it scared the bejesus out of me!
"Dude. Whoa, That Cock Knocker' pulled a Schleipman and it scared the bejesus out of me!