Patman's terrible driving, with the extreme speeds and constant crashing. Even better is that he knows it; the first episode has him say to Jess, "My driving is terrible!"
Every time Patman goes to see Granny Dryden, he yells "Morning, bitch!" upon entrance.
Leather-bound sticks with handles are casually laying around everywhere in Greendale.
A loud foghorn sound is often used in place of swear words.
Miss Hubbard riding her bike is often accompanied with Myra Gulch's theme.
Patman Post is a really terrible driver
Miss Hubbard randomly explodes after a lot of rum. Afterwards, someone casually yells "Where's all the rum gone?"
*Patman repeatedly trying to close the doors on the van* "Stupid van." *doors finally shut, Jess yelps*
"The children had made a picture of {Patman} with "Big Shit" written underneath. 'Stupid little farts,' thought Pat."
Patman shouts into an empty letterbox, expecting post to appear. He shuts the door, then opens it again, and a giant pile of letters fall out.
Postman Postman Red Van, set to the tune of "Badger Badger Mushroom".
"Greendale was in deep shit."
This exchange:
Narrator: It was icy as well. Peter: No shit!
"This biscuit is nasty."
"He had to drive carefully on the slippery roads." *Patman proceeds to speed around town, even faster than he had in the previous episode*
Mrs Goggins gets outrageously angry at a faulty parcel, first yelling in Gratuitous German while trying to tape it up, then throwing it through the window. Patman's reaction is a cheery "That's one way to deliver a parcel!".
The snowman really has it in for Patman, dumping snow on him every time he leaves a building. The third time, he gets Jess as well.
Granny Dryden can't hear Patman reading worth a can of beans. Eventually, Patman gets fed up and uses a megaphone.
Patman's van goes flying right through Alf Alfson Thompson's barn. Alf has no reaction to this.
Alf and Patman blowing up George's house.
Patman eventually gets revenge on the snowman by pissing on it.