1 definition by Nielypoo

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

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