Rihanna almost got her block knocked off after coping a feel off the wrong stripper at Sex Club in Toronto.

Reports Rhymes With Snitch:

Partying after a concert performance, raucous thrush RIHANNA popped into Toronto’s titillating Bovine Sex Club to unwind with her entourage and then – looking all slinky-sexy in a black cat-suit complete with a bondage-style leather policeman’s hat – RiRi pretended to put several hot-looking lady patrons under arrest, frisking them, and even copping sly feels of their…ta-tas! The “prisoners” all swooned, except for one tough-looking babe – who went butch/ballistic when the star started patting down her sweet li’l lady love.

“What the **** are you doing!” bellowed the green-eyed monster. “Get your ****ing hands off my girlfriend!” Backing off, Rihanna hissed cattily: “You need to chill… I’m just playin’.”

But the purr-former and her posse quickly padded off to the opposite end of the bar to avoid a cat-astrophe!

@ebengregory