Steven Slater cops to having a drink before famous walkout

Ex-JetBlue flight attendant Steven Slater yesterday admitted to drinking before his notorious plane exit.

“It was one of those days that drove me to drink,” he said on ABC’s “Good Morning America,” adding that he wasn’t too intoxicated to perform his job.

He also said a “perfect storm of bad manners” — including his — prompted the stunt.

Slater, 39, pleaded guilty to second-degree criminal mischief.