louse up
[verb]
Synonyms: botch, bitch (up), bobble, bollix, bungle, goof (up), gum (up), mess, mucker, screw (up)

[TahlilGaran] English Synonym Dictionary ▲

louse something ↔ up phrasal verb informal (see also louse)
to make something worse rather than better, or to spoil something Synonym : mess up:
That idiot loused up my chance of promotion.

[TahlilGaran] Dictionary of Contemporary English ▲

louse up
throw into confusion, make a mess of something, spoil something
She loused up her job interview and has no chance to get the job now.

"Please try not to louse up the computer again. It was working fine this morning."

[TahlilGaran] English Idioms Dictionary ▲

louse up
v., slang To throw into confusion; make a mess of; spoil; ruin.
When the man who was considering John's house heard that the basement was wet, that was enough to louse up the sale.
Fred's failure in business not only lost him his business but loused him up with his wife.
The rain loused up the picnic. See: MESS UP², FUCK UP.

[TahlilGaran] English Idioms Dictionary ▲