maggot breath 

When someone's breath is so putrid that they might as well have maggots breeding in their mouth

Get your ass over here maggot breath!!

maggot breath by Bluesuade October 28, 2015

breathing maggots 

A term often used by old people to explain the feeling of being hot and sweaty, also can be said as "breeding maggots".

Dale: arnt you hot wearing that coat?

Grandma Jam: eeeeee im breathing maggots

Dale: You must be cos im sweating cobs.

breathing maggots by Jam and Dale June 11, 2006