Peter help, what is the joke here?

I dun knu

Peter.. uhh something something, what’s the joke.

What is so happy about this place

Peter why is my car relevant

what game are they talking about?

I know 4 of the 5 characters (idk top left), but I have no idea what this means?

Hundreds of comments with no explanation, I guess I’m the R??

Petah I don't get it, 10 gallon hat? Does that have something to do with the shower?

Im sure the answer is on the tip of my tongue, just don't know the context.

Facebook meme someone in a group chat was asking about. Idk either.