"Semitone flat" joke

A semitone flat on the high notes.

A square with only three sides.

A steering wheel / few bolts short of a Yugo.

A teapot with a cracked lid.

A titanic intellect... In a world full of icebergs.

A vacuum-tube brain in a microchip world.

A VGA card and a Herc monitor.

A victim of retroactive birth control.

A violin minus the bow.

A walking argument for birth control.

A wind-up clock without a key.

About half smart.

Afraid she`ll void her warranty if she thinks too much.

Airhead / bubble-brain.

Aliens zapped him with stupidity ray -- twice.