Can a bird have a potty mouth? I think so.
Had a blue and gold macaw, he would watch cartoons. He had picked up where they would have the audience laugh in the background, you could turn the tv sound off. He would know just where to laugh at the funny parts he must have picked up on some visual cue in the video when the laugh should be.
LOL!
Like children, parrots are quick to pick up expletives.