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When you have a cold and no matter how many times you brush your teeth or chew gum IT KEEPS COMING BACK!
with the after taste of phlegm and other unmentionable horrors.
Dude: Hey i just went to visit sarah today but i could NOT kiss her ...she had some serious sickbreath!

Dude2: word.
by harrytacoeater June 21, 2009
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the foul odor, on top of your partners bad breath, associated with a cold or some other type of sickness.
"aww babe you got some horrible sick breath"
by aawalll October 20, 2009
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