1. informal A more emphatic way of responding "yes." "Sirree" is itself an informal variant of "sir"; it is sometimes spelled "siree." A: "Are you going to the party tonight?" B: "Yes, sirree. Probably going to head over there around 9 or so."
2. informal Used to emphasize what one just said, rather than being addressed to anyone in particular. Yes, sirree, this new lawnmower will take care of that grass in half the time it used to take! I truly believe that this is the finest pizza in all of New York City, yes, siree!
See also: sirree
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.