that can certainly affect you huh? That really is yucky... ...poor people probably not aware of it at all....and it's embarrassing both ways to say something about it huh? For me in one nostril and out the other, finished. ...but if this is someone you work with on a close basis you gotta say something, give em a bottle of Listerine and say this should be your best friend. :)
They probably don't know it and/or have dental issues or other things going on. I know someone who's breath smells like poo. He is married, his wife needs to let him know. Especially since he deals with the public. Of course if it is due to serious health issues there may be nothing he can do.
Baba 