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.

When you eat dirt for the first time and leave your family to build a shack in the woods

The sound made by the IM from Mac's iChat service.