Just when I thought the McPoyle's couldn't be topped
... It's Always Sunny in Philadelphia introduces us to "Uncle Jack," who has moved in to Charlie's mom's house, in Charlie's old room.
No spoilers other than the portion when Uncle Jack offers to share the room with Charlie:
UJ: "It'll be fun. You and me, palling around. Getting nuts. Doing crazy, fun things."
C: "I'm not doing any of the things you want me to do with you, Uncle Jack."
UJ: "No. It's stuff that relatives do."