Kristin Cavallari -- GIVE ME 5 DOLLARS ... Bitches.

This video is pretty great ... Kristin Cavallari messing with the paps after a night of clubbing in Hollywood -- shakin' 'em down for cab fare in exchange for a photo ... and it's awesome.

It's that classic KC bitchiness we all know and love ... with the reality star shaming the paparazzi for $5 outside Hooray Henry's in Hollywood -- "I just posed for you. Pony the f*ck up."

Eventually, one of the snappers opens his wallet ... but Kristin was clearly not impressed.

It's not like she needs the money -- her husband Jay Cutler is at the end of a 5-year $50 million contract.