An idiot or moron. Someone so stupid that he doesn’t know he’s stupid. Derived from Richard “Boner” Stabone.
That guy bought a Buick Skylark because he thought it was a flying car. What a fucking stabone.
When a guy jerks off and shoots the load in his own face.
guy 1: Hey, I'm going to jerk off.
guy 2: OK. Don't forget your cannonball goggles.