Farrah Franklin, a former Destiny's Child singer, got busted for public intoxication -- note the red nose in her mug shot -- and allegedly told police she should've downed even more alcohol.
According to cops ... Farrah got into an argument with a male friend around 3 AM Thursday outside a gym in DeKalb County, GA. When officers showed up she said she was not ready to go home, and added ... "These n***** won't leave me alone."
Cops noticed signs of drunkenness -- odor of booze, slurred speech and bloodshot eyes -- and asked how much she'd been drinking. She fired back, "Not enough."
Farrah -- who was in DC from 1999 to 2000 -- was arrested and booked for public intoxication and possession of a small amount of weed.
Bail is set at $250. She's still in custody.