P. Diddy and his 15-person entourage allegedly rang up a $200 tab at a New York City bar during the 2014 Super Bowl over the weekend... with a waitress claiming he stiffed her $40.

According to TMZ, Employees told that on Sunday the Hip Hop mogul were at The Bar located in the Dream Hotel and when the bar's manager asked him if he was receiving good service... Diddy said every was A-ok.

The site adds:

When it came time to pay ... staffers say Diddy left a giant goose egg for gratuity.

Now The Bar is calling him out ... ridiculing him on its Facebook page -- "Although [Diddy's] Net worth is in the millions, he felt it necessary to stiff a hard working young girl for $40 bucks. What a gentleman....!!!"

Of course it's possible Diddy thought, for once, someone else in his entourage would pick up the tab.

And after leaving the bar, Diddy and his celebrity entourage including Ashanti, A$AP Rocky, and French Montana headed over to a Harlem outdoor food joint named, O'fishole Sea Food, to grab some night caps.

Ashanti reportedly left the food joint's owner at $100 tip. See photos HERE