when a female needs a favor, she can (literally or figuratively) shake a little ass. this means she can offer herself or something else of interest in exchange for this favor.
Aesha: damn, Tasha i really wanna go to the movies but i need a ride...
Tasha: damn, you better shake a little ass!
Tasha: damn, you better shake a little ass!
by moonlight! June 29, 2011
Get the shake a little assmug.