Smidgin

A small portion of human penis. (A tiny pecker)

A small portion of human penis. (A tiny pecker)

Example:
A man was walking the wrong way up an escalator, suddenly his pants got caught. Too bad he wasn't wearing underwear as his smidgin was revealed.

Bumcrums

The left over particles of your most recent shit!.

Jim: Ew.. You've got bumcrums
Barry: Get the hoover, QUICK!