An adjective describing a person or thing as "dirty," "filthy," as being outside the norms of society, or as lacking in any sort of decorum whatsoever.
"Those kids went to see the movie 'Rent,' but they've never seen the play, those classless fucks."

"The mustard stain on Bill's v-neck t-shirt made him look completely classless."
by drcrime March 7, 2006
Someone who spins everything to show how worthy they are and how much power they think they have. Someone who tells stories to benefit their own agenda. In a work environment, this is usually a marketing director.
She is such a classless loser to take that information and make you out to be the problem.
by In the closet again August 19, 2011
A person that doesn't understand normal social cues.
Sumbag Steve is such a Classless Croatian. He takes his shoes off on a plane.
by BilThrillHouse May 23, 2019
"Classless society" refers to a society in which no one is born into a social class. Distinctions of wealth, income, education, culture, or social network might arise and would only be determined by individual experience and achievement in such a society. In other words a boring society devoid of any interesting characteristics and also mediocre at best.
A classless society SUCKS! There's no fun, diversity, nor any individuality!
by Type2GenomeManiac June 9, 2017