Halitosis

Halitosis was also more commonly known or referred to as bad breath. (PROSE: The Rhino of Twenty-Three Strand Street)

Disguised Slitheen gave off a scent of halitosis. (AUDIO: The Taste of Death) Rose Tyler and Harriet Jones identified the farts of the skin suited Slitheen as smelling of "bad breath", which the Ninth Doctor attributed to calcium decay. (TV: World War Three)

When William Shakespeare leaned in hoping for a kiss from Martha Jones, she shot him down by telling him that "[his] breath doesn't half stink". (TV: The Shakespeare Code)