There’s a wounded lady onstage. When cabaret singer Baby Jane Dexter hurls her rich, bossy baritone at you, brother, you’d better run in the proper direction, depending on whether you’re on her good side or bad. Voices like hers don’t come from harmless little ladies. Dexter’s a large gal—on her latest CD, Big, Bad & Blue Live! (recorded at Eighty Eight’s in Greenwich Village, where she’s a regular), she throws every ounce of her huge contralto behind “Big Body Woman,” reveling in the sheer authority of her weight. With the taunts of “Dirty Man,” she reaches a righteous tirade worthy of Janis Joplin. Dexter goes torch on “Something to Live For,” cooing and purring like a mature Sarah Vaughan. And with the scorned reproach of “Damn Your Eyes,” she’s like nobody else. She’ll get you one way or another. Dexter, accompanied by pianist Ross Patterson, performs at 8:30 and 10:30 tonight and tomorrow night at the Nest, 1401 Pennsylvania Ave. NW. $18 (202) 637-7440. (Bradford McKee)