Crocodile Crikey

While doing her doggy style, push her (or him) on her (or his) belly and slip into her (his) ass. Watch her (him) squirm around like a crocodile. Bonus points of she's (he's) Australian, as they might say "Crikey!"

"Heard ya pushed 'er boundries last night mate."
"Yeah I pulled off a Crocodile Crikey!"