when a person is acting shadey...kinda I guess talking smack behind ur back.. then acting like everythings peachy king when youre face to face with them
by Kerrianna Beck May 16, 2003
Get the shiestymug. to be shady or wavering in general trustworthiness. To invoke feelings of unreliability and hesitancy in people. To have inexplicable trust in shady organizations and characters
by shangsta August 24, 2010
Get the Shiestymug. by jd-squared September 30, 2005
Get the shiestymug. by L-dogg December 6, 2003
Get the shiestymug. 
Based on the word "shyster," meaning "an unethical, unscrupulous practitioner, especially of law." It comes from the German term "scheisser," which literally means "one who defecates."
by Venus May 27, 2004
Get the shiestymug. by The Ay dog November 24, 2010
Get the Shiestymug.