adj. Describing the mouth of a man or woman that has cured a man of blue balls.
Jeff got blue mouth after helping Erik with his "problem."
by Shpoiken April 29, 2005
A pent up need to spew curse words, foul language or vitriol that requires a verbal release of swearing to relieve it.
After a day working with pre-schoolers, Mr. Brown liked to relieve his blue mouth by hurling a string of expletives at no one in particular.
by New in NY May 14, 2012