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1. slang Any unpleasant residue or matter. The word originated as a trademark name for a degreasing solution. You're gonna need a more powerful cleaner to get that gunk off the sides of the tub. I was just working on my car, so I need to wash this gunk off my hands.
2. slang A glue or aerosol that one inhales in order to become high. Gunk is dangerous stuff, you know.
To cause something to be filled or covered with some thick, greasy, or filthy substance. A noun or pronoun can be used between "gunk" and "up." You've got to make sure no dirt gets into the seal, or it could start to gunk up the inside of the machinery. I hate it when the kids get ahold of my phone, because they invariable gunk the screen up.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. n. any nasty, messy stuff. Get this gunk up off the floor before it dries.
2. n. glue sniffed as a drug. (Drugs.) I thought that it was illegal to sell gunk.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.