sack up

Found in Anh - Anh (Wordnet)

Definition Verb (informal, chiefly US): 1. To accumulate or gather something, especially money or profits, often implying a substantial or final amount. * This sense directly relates to the financial outcome of an endeavor. 2. To summon courage or nerve; to "man up" or prepare oneself mentally for a challenging task. * This is a figurative, idiomatic extension of the first meaning, suggesting g...