Broken Axle 

When you keep going after one of your limbs gives out or cramps up during sex.

She said I was the best she ever had even though I had a broken axle the whole time.

Broken Axle by Rshrsh July 26, 2014

broken axle 

when you are walking and get "flat tired" (When you step on the back of someone's shoe to make it come off, or make them trip.)behind your knee instead of your foot, with a fist!

First my friend flat tired me then she gave me a broken axle!I fell face first because that bitch!

broken axle by broken axle June 23, 2008