Twirp

Main Entry:
  twirp

variant of

Main Entry: twerp
Pronunciation: \ˈtwərp\
Function: noun
Etymology: origin my father-in-law
Date: circa 1980

: an underwater toot

Definition of twirp as given to my wife, by her dad, when she was a kid. This was relayed to me the other night at supper and I laughed for a couple of minutes on the outside, and am still enjoying a sustained chortle on the inside.