Trashy people are characterized by a hollow arrogance born out of insecurity and stupidity. Because deep down they know they are trashy they overcompensate in the following ways:
Trashy women think their bodies are much better than they really are and display a lot of skin, usually muffin top / fupa. They also wear gaudy skimpy clothes, usually too tight to draw attention to themselves. Tattoos can also be part of this.
At work they think they should be running the place after 3 days on the job and in spite of being complete fuckups.
Trashy people people are loud, boastful and have foul mouths in an effort to draw attention to themselves and sound tough.
Trashy people are selfish and not team players. Their only goal is to satisfy their needs and they think nothing of taking advantage of others to get what they want. They think this is the "American Way".
Because they are insecure, trashy people tend to follow the latest trends, no matter how stupid because they want to be accepted.
Because they are stupid, trashy people tend to smoke, being either unaware or uncaring how horrifyingly unclean and disgusting a thing tobacco is.
Trashy women have sex frequently and unscrupulously for power and attention.
At the State Fair you see a lot of trashy women smoking and wearing lowrider jeans showing their muffintop.