In Québec, there are two different categories of language that are categorized as non-standard French.

A patois is a regional dialect. I'd say we classify it as a different language.

Joual is a butchering of the language and is considered bad language. An example is when somebody says, ouin (sounds like wain) instead of oui (oooy) (this means YES in French). Tsé (approx pronunciation: tsay - in one syllable) instead of Tu sais (approx pronunciation: too say) (this means "you know")