Yes Guy
The Yes Guy (also known as The Frank Nelson Type or That jerk that goes "AYEEEESSS!?") is a recurring character in The Simpsons. The Yes Guy is known for continously going "YEEESSS!?" or "AYEEESSS!" and has a high-pitched voice.
During his first appearance, in Mayored to the Mob, Homer asked “Why do you talk like that?”; The Yes Guy’s response was “I had a strooooooooooooooke!” He also made an appearance in Homer vs. Dignity of season 12.
He is a tribute to a recurring Frank Nelson character from The Jack Benny Program, I Love Lucy, and later Sanford and Son, whose trademark greeting in all his characters was a loud, drawn-out “Yeeeeesss?!” Inexplicably, the original character could always be found working behind the service counter of whatever shop Benny or Fred Sanford might be patronizing, and his Simpsonian counterpart is equally omnipresent. There was also a Brazilian version seen in the episode Blame it on Lisa, uttering a Portuguese variation of the catchphrase.
The Yes-Guy shares the physical characteristics of his real-life counterpart: he can be described as a rather squat, stocky man with a moustache, and black hair receding into a widow’s peak. The Yes Guy is voiced by Dan Castellaneta.