buzzard breath 

breath so bad it could knock a buzzard clear off an out-house for 100 yards away

That dude has some serious buzzard breath workin'

buzzard breath by Cigar City Nole May 25, 2010

buzzard breath 

All the sweetness of breath that you'd expect of a creature that eats carrion.

If your idea of a hot meal was pavement pizza warmed over on the asphalt solar griddle, you'd have buzzard breath too.

buzzard breath by Downstrike August 27, 2005