Aaron Hernandez downed a ton of hard liquor, cussed out security guards ... and refused to leave when they confronted him ... in a Hermosa Beach, CA sports bar.
According to sources who were in Chelsea Pub & Lounge on April 19th ... the then New England Patriots star was drinking double Patron Silver shots all night in between glasses of Adios Motherf**kers -- a wonderful vodka, rum, tequila, and gin concoction.
We're told Hernandez repeatedly tried to walk outside the bar WITH his drink, and didn't understand why security wouldn't let him -- and began yelling and cursing at the bar staff.
When asked to leave ... Hernandez simply sat down (pictured above) and told security he wasn't leaving.
However, once multiple security guards surrounded him ... he paid off his hefty bar tab and left peacefully.