O clamp
An "O" clamp is when a woman’s legs lock up so tight, they throw the penis out like it was a bad idea. It doesn’t last long, but it can make you want to quit sex for good.
She clamped me out like I was a mistake she was tired of.
He was about to finish when she clamped him out like he was a bad bet.
I was almost done when she clamped me out like I was a broken chair.