to goof up
- slang To make a mistake.
#:If I go near a skateboard, I'm sure I'm just going to goof up and fall off.
- transitive|slang To introduce problems to or damage through incompetence.
#:I tried to fix it, but I think I just goofed it up some more.
The object of the transitive verb comes between "goof" and "up", so "I goofed it up" is correct, and *"I goofed up it" is not.
cock up (UK), foul up, fuck up (taboo), screw up
balls up (taboo), bollocks up (UK, taboo), bugger up (UK, taboo) cock up (UK), foul up, fuck up (taboo), mess up, screw up