Cha

Used in place of yes or good

Ex 1: Friend: did you do the history homework?
You: cha it was pretty easy

Ex 2: Friend: what did you think of that?
You: it was pretty cha

gas job

A gas truck. Often used to express distaste that it's not a diesel.

Billybob1: That's a sweet Ford!
Billybob2: Yeah but that ain't no Powerstroke, that's a gas job...