stompbox 

A guitar effect housed in a small casing (usually made of metal) and it is operated by foot.

The guitarist from Incubus used a wide array of stompboxes in his live performance.

stompbox by Yngwie Malmsteen June 30, 2004

Stompbox 

Girl who is always getting you down, can be a bitch, snob or just depressing. Can also be used as just a general term for girls that you want to insult. Also applicable to feminine emo males.

Man that girl is such a stompbox! or What a fucking stompbox!

Stompbox by StompboxBoosher69 September 19, 2009