Discussion Forum—A Way with Words, a fun radio show and podcast about language

In “year of words” episode a lady used the phrase “bad grammar.” My understanding has been that the method to describe so-called “bad grammar” is actually the word “ungrammatical.”

I have two queries: 1) Is this correct? and, 2) Where did I get this idea?

Any help would help (oops).

Norman Germani
El Centro, CA