Are these common english?

I got a bim friend he always says

"let's put on the pot" for cook something

and

"don't worth a pat shot at" for somebody is not worth to talk with or argue with

he says these are common english that all english speakers ought to know them, but i really don't think so...hmm...however I don't use them at all. Do u guys think they are common terms? im the pat don't worth to shot at now LOL

I've heard "let's put on the pot" before. I wouldn't call it typical.

"Don't worth a pat shot at" isn't even intelligible English, much let common English. Sure he's not saying, "Not worth taking a potshot at?"