Also found in: Dictionary.
To gather items. A noun or pronoun can be used between "collect" and "up." I need someone to help me collect up all of these donations for the food drive. Collect your toys up—it's time for bed!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
collect something up
to gather something up. Collect your things up, and let's go. I collected up all my luggage and left.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.