A little 'street knowledge' helps here. Trav, I included you because you like these.
In the 'urban setting', people who live in the urban lifestyle will say "folk" quite a bit, dropping the 'lk' in the pronunciation, as in "Dat is too a full eight-ball, fo'."
When challenged, they can deny they were calling you a fool. "Ah was callin' you FOLK, fo'."
Been there, challenged that.
Another street term, they call police "folk" too. Same pronunciation.
You’re on to him. I, too, have confirmed that everytime he says “folks”, he is winding up to tell a whopper. A sure ‘tell’.