Literally means "Everything's cool, you will forget about it soon enough" often used in a non comical situation but at its mention, changes it into a comical one. First used and developed by Joey Brozonez and Troop 51.
Colin: damn, my dog was just killed by a C-ville punk (starts crying)
A seemingly innocent phrase used to describe an incredibly dire or terrible situation in which, no matter the users assurance, the situation will NOT "buff out" or improve to any high extent.
*Individual A proceeds to sit in a chair and, in doing so, breaks the chair*
Individual B: *in a sarcastic tone* It'll buff out.