'Real Housewives of New York' -- Druuuunk Sonja Morgan ... Slurring Defense of Brandi Glanville

Ladies and gentlemen ... SHE'S BAAAAAAAAAAAAAACK!!!

"Real Housewives of New York" star Sonja Morgan had a few too many last night ... once again ... and unleashed her legendary drunk alter ego on the streets of NYC.

Sonja had just finished dinner with NeNe Leakes when she decided to get some fresh air ... and spilled her drunken guts about some fellow "Housewives," including Brandi Glanville.

"I don't like what people did to Brandi ... 'cause Brandi is straight up ... straight ... smart."

Totally.

There's more ... drunk Sonja talks to the cops, gives advice on life and even weighs in on municipal politics -- pretty funny stuff.

It ain't the first time Sonja's gone on a bender ... we got her out last year, when she tried to drunkenly discuss Ashton and Demi's relationship.

Advil anyone?