Top definition
When one's breath smells as if small rodents and boofonky have been roasting inside. Creating a Hot Breath Oven (HBO)
Person 1: HO MAH LAWD! Did you smell that librarian's breath?!

Person: YES! My goodness. It was was smelling like Hot Breath Oven (HBO)!
by Nielypoo July 21, 2010
Get the mug
Get a Hot Breath Oven (HBO) mug for your cat Paul.