feed up(redirected from fed them up)
To feed a person or animal, especially with the aim of increasing their or its weight to a healthy or desirable level. A noun or pronoun can be used between "feed" and "up." My grandma was always feeding us up whenever we came over to visit, saying that we looked like skin and bones to her. You'll want to feed up your young snake with plenty of healthy mice.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
*fed up (to some degree) (with someone or something)
bored or disgusted with someone or something. (*Typically: be ~; become ~.) I am fed up to my eyeballs with your complaining. I am just fed up to here!
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.