When a male and female are having intercourse, usually doggy-style, and the cock slips "accidentally" into the female's asshole.
If the male continues to chock against the females wishes, this moves into ass rape.
A female may or may not enjoy being chocked. If she asks for another chock,the chocking moves into anal sex.
"Dude i fucked Jenny yesterday and it was going pretty well until i chocked her and she started crying."
"So my bf chocked me yesterday and i kind of liked it..."
"Chock me once shame on you, chock me twice shame on me.