muck up
Intermediate (B1)informal
To ruin or make a mess of something.
"I completely mucked up my driving test — I stalled three times."
Hear it in context
Why CPU Time ≠ Wall Clock Time! - Computerphile
Computerphile · 13:44
and muck up the clock in unusual ways, right?
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BallislifeHoops · 114:36
Like to be honest, you got to muck up the game.