The noise in which a penis makes while exiting the pants/underpants which keep it confined. The noise is audible if and only if the person possesses a penis with proper length and girth to cause said noise. The noise is usually accompanied by a loud bang as the male appendage hits and most likely breaks whatever is in front of it.
A schoomp may also be used to exit awkward situations.
Girl: Hey big boy, want to have fun tonight?
Guy: yes i would enjoy that.
Girl: show me what you're working with.
Girl: Ow you broke my jaw!
mom: Son, i found this bag of pot in your room.