It's what you call it when someone is talking trash about another person or thing. Instead of having intellectual vocabulary, you choose uneducated slang words.
( a combination of trash and vocabulary): a person's personal vocabulary made up entirely, or almost, of swear, racist, pejorative, misogynistic/misandristic words
enough with your trashabulary; is there any way i can wash your mouth with soap?
The scum of trashtabula mostly methheads and crackwhores that nod out in parking lots and smoke partial cigs off the streets . These people reak of b.o and can be found fornicatingon park benches
See that guy passed out in that dodge neon .. ..he is definately a trashtabulian