Lil Wayne is admitting he has/had a substance abuse problem ... specifically sizzurp.
The rapper claims he frequently pounded the codeine-based drink, often spoken about by artists in his genre in an attempt to sound hard, but only 'cause he was "sick."
Wayne spilled his guts in a new documentary-style video shot by one of his pals, saying he first started drinking the stuff when idol Pimp C would often rap about it.
Pimp C died of an overdose of sizzurp in 2007.
Im'ma letchu in on a li' summin...
Weezy claims he relied on the gangsta beverage as he became more famous, saying he needed the drink to help him cope with the pressure of being a celebrity.