jab fab
Trying to fix something with whatever's lying around, even if it's not even close to fixing it. You're just being lazy and pretending you're smart.
He tried to fix his watch with a spoon and a sock. Now the watch is broken, the spoon is stuck in it, and he's confused.
She used a pizza box and a pencil to fix her phone. Now the phone is in a pizza box and the pencil is on her head.
I used a broken calculator and a sock to fix my math test. Now the calculator is broken, the sock is on my paper, and I’m still failing.