Jimmy, that's not a penis Share definition Flag A common English phrase, used when nothing else can be said, often in awkward silences. Man 1 "My wife died one year ago today." Man 2 "...... Jimmy, that's not a penis" Jimmy, that's not a penis by Adamdoesntlikegirls April 29, 2015 0 0 Get merch Get the Jimmy, that's not a penis mug. Buy Now — $32.95 See more merch