A trashy person who burdens others with a disgusting or dirty act, either accidental or intentional, then slinks away leaving the burden on others.
So that trash bastard crashed in my spare bedroom after a heavy night of drinking. When I woke up the next morning, I found he wet the bed and was nowhere to be found.
You mean to tell me, he stole all the belongings in your parents house and the cash and now wants to have a share of the inheritance. What a Trifling Bastard!
An extremely slippery type of person who has a way of being so unbearably stupid that you don't understand how they could possibly be a functioning human being.
This term can also be used as a unit of measurment.