Wiktionary
kick like a mule
vb. (context simile English) To have a very strong physical effect
Usage examples of "kick like a mule".
And Whyte-Melville and old Tosti have crammed it into twenty lines of verse and a hundred or so bars of music, and while the result may not be great, by God it's true and real, and that is why that song still has a kick like a mule, for all its old-fashionedness.
He fired at the muzzle flash, then the second shot caught him high on the chest, with a kick like a mule.
The worrying part is that I was forced practically at knifepoint to take ballet lessons as a child, which means I can kick like a mule.
They've got a kick like a mule, but it's hard to miss with a shotgun at close range and double-ought will take down a Posleen just fine.