This sound is from Porky Pig Soundboard

Porky Pig is a cartoon character from the Looney Tunes. He is wise and good-natured, but also shy and cowardly. He often plays the sidekick to the rest of the Looney Tunes. He speaks with a stutter. His trademark is closing all the Looney Tunes with the phrase Th-th-th-tha-tha-tha-that's all, folks!