Someone who you would think has tourettes syndrome due solely to the inordinate amount of profanity that comes from their mouth. In reality they are just one of those people whose vocabulary consists of 80% profanity in the form of verbs, nouns, adverbs, and adjectives. The other 20% consists of personal pronouns. The oddity of this type of person is in the sole fact that they are not angry when they curse, it is just part of their day to day speech.
Man 1: "I can't believe all of these f****** people are seriously f******* driving this f****** slow, s***.
Man 2: "Dude you are such a Po Yu"
Man 2: "Dude you are such a Po Yu"
by lestat_xi August 6, 2010
Get the Po Yumug. 
A nice but deep shit person. Lazy booty who sits at the tv and watches it all day. Poor bitch but likes dogs and often call his friends that.
by Meissagây March 30, 2019
Get the Jun Yumug. by jrbobdobbs June 12, 2004
Get the Guan Yumug. by hayley yates December 12, 2003
Get the Debbie Yumug. 
A week-long event in Springfield College that differs for student and faculty; for faculty, it is a week-long ongoing 'carnival', with many activities; for students, it is a week-long drinking experience, in which it is tradition to become as fucked up as possible.
by SCAlum April 10, 2008
Get the STI-YU-KAmug.