back up the truck

English

Etymology

From the idea of bringing a truck to a location to be loaded with goods.

Verb

back up the truck (third-person singular simple present backs up the truck, present participle backing up the truck, simple past and past participle backed up the truck)

1. (informal, idiomatic, chiefly finance, chiefly US) To take advantage of favourable pricing by purchasing a large amount.
   • 2011, David M. Smith, Hany A. Shawky, Institutional Money Management, page 82:

     When spreads are very low and contracting, back up the truck and buy equities. When they are high and rising, it's time to hide.