Yes siree(, Bob)!
Inf. Absolutely!; Without a doubt! (Not necessarily said to a male and not necessarily to Bob.) Mary: Do you want some more cake? Tom: Yes siree, Bob! "That was a fine turkey dinner. Yes siree!" said Uncle Henry.
See also: yes
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.