Yes Guy

"Yee-e-e-es?!"

- Yes Guy's catchphrase

Mr. Pettigrew, better known as the Yes Guy, also known as the Frank Nelson-Type, but normally referred in-show as That Jerk That Goes Ye-e-e-es (or similar names) by Homer, is a resident of Springfield. He is known for bellowing “Ye-e-e-es?!” in a rising inflection, and appears to be highly eccentric in both his speech and appearance.

History
On his first appearance, when Homer asked the Yes Guy why he spoke like he did, after he had said "yes" two times with is unique tone, the Yes Guy responded that he had a stroke.

He is often seen working at Costington's department store, and is apparently on good terms with Mr. Costington. When Lisa was put on trial for teaching fellow students about Darwin, the Yes Guy was juror number twelve. He also once worked as an ice cream truck driver and gave Bart some free ice cream. The Yes Guy also once worked for the reality show Frame Up, where he pretended to take a phone call from the governor regarding whether a condemned Homer should be reprieved. During the call, he used his catchphrase (and a "No" version of it) several times.

Homer refers to him as "that jerk who always goes yes".

Non-canon
His name is revealed to be "Mr. Pettigrew".

Behind the Laughter
The Yes Guy is a tribute to character actor, and his familiar persona on The Jack Benny Program (modified for appearances on I Love Lucy, The Flintstones, Sanford and Son, and others). Nelson's trademark greeting was a loud, drawn-out “Yeeeeesss?!” This was often augmented with a sarcastic "OoOOOoooh!" Originally, this character could be found in a variety of occupations, usually as a salesman or waiter, at establishments which Jack Benny or others might be patronizing, and his Simpsonian counterpart is equally omnipresent.

Variations
A Brazilian version of the Yes Guy can be seen in the episode "Blame It on Lisa," uttering a Portuguese variation of the catchphrase: "Si-i-i-im?!".