Bad Ol' Putty Tat is a 1949 Warner Bros. Merrie Melodies animated cartoon directed by Friz Freleng. The short was released on July 23, 1949, and stars Tweety and Sylvester.

Tweety must evade the titular "puddy tat," Sylvester, who is once again in hot pursuit of Tweety, just so that he can eat him for his own personal snack. It provides an anomaly in the Sylvester & Tweety pairings: In this one, Tweety provides almost all the dialogue, and then mainly to the audience. Tweety's voice is performed by Mel Blanc, who also screams out Sylvester's pain in mid-film. The story was written by Tedd Pierce; he and fellow Warner Bros. cartoon writer Michael Maltese appear in caricature form as a pair of badminton players.