Brian mug says:
Don't let the Gobblers get you down
Nicole: Maybe it'll bring you and dad closer together...
Brian: Are you high?
Summer: You're gonna be late for work...
Adam: What, are you worried I'm gonna get fired?
Summer: Not at all. You can always tell them you stayed up all night, not having sex with a stripper...
Heather: You don't have to invite me just 'cause I found your cheese.
Nicole: It's a classic father son dynamic.
Brian: Well, thank you, Cat Stevens.
This is alluding to Cat Stevens' hit song Father and Son.