hot rod

Short definition from Wiktionary

Noun

1. 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. 2
   The penis.

Verb

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