louse up

No — say "Don't louse it up.". when the object is a pronoun, it must go between the verb and the particle.

Infinitive

louse up

Past

loused up

Past participle

loused up

Definition

phrasal verb. to spoil or ruin something by making a mistake or doing a bad job.

phrasal verb. to spoil, ruin, or bungle a situation or task. Transitive; typically implies a lack of competence or care leading to failure.

simple

“I hope I don't louse up my job interview today.”

contextual

“The project was going well until a small mistake in the budget managed to louse up the entire plan.”

complex

“Despite months of meticulous preparation, a single logistical oversight threatened to louse up the diplomatic summit's opening ceremony.”

this verb is separable, meaning you can put the object between 'louse' and 'up'.

contrast with 'mess up' or 'screw up'; 'louse up' is slightly more old-fashioned but still common in informal American English.

Don't louse up it.

Don't louse it up.

when the object is a pronoun, it must go between the verb and the particle.

Particles

up

Separability

optional

Pattern

louse + (object) + up

mess upruin spoilbunglebotch