hot rod

Etymology
Attested since 1945 in American English, specifically meaning ‘hunk of metal’.

Noun

 * 1) Typically a passenger vehicle modified to run and/or accelerate faster. The term may be used generically to apply to any car, truck, or motorcycle (et al.) modified for increased speed and/or performance. It may also be used to specifically describe and refer to modified cars from the original (or traditional) era of "hot rods", post World War II and prior to 1960.
 * 2)  The penis.
 * 1)  The penis.
 * 1)  The penis.

Verb

 * 1)  To modify a vehicle for enhanced driving performance, top speed, and/or to accelerate faster.

Synonyms

 * customize
 * modify