1
general::
Phrase(s): fatten up (on something)
1. Lit. to get fat by eating something. • The cattle fattened up on the succulent grass. • The bears have to fatten up on food before they hibernate for the winter. 2. Fig. to become prosperous because of something. • The corporations fattened up on easy profits and low taxes. • The directors of the company fattened up even during the recession when the workers were laid off., Phrase(s): fatten someone or an animal up (with something)
to use something to make someone or an animal fat. • We will fatten the calf up with corn. • I don’t know why they keep fattening up their children with so much food.
McGrawhill's American Idioms And Phrasal Verbs