Something Charlie Brown would say in downtrodden acceptance when something bad happened on Peanuts. A phrase that's fun to say just because you're quoting Charlie Brown. It's almost like a secret-handshake. It identifies you as a Peanuts lover, and is probably good for meeting people. I'm gonna start saying it more often. I'm surprised not to many people use it, because it's pretty cool.

"Good Grief" is the name of two different songs by two very different bands. The first is by the Foo Fighters on their self-titled debut album (which fails to mention Charlie Brown), and the second is by Urban Dance Squad on their album Persona Non Grata (which includes the words "you gotta be down, like be like charlie brown, good grief"). The Urban Dance Squad song is also featured in the movie Hackers.