carefree; casual; offhand; careless or sloppy in one's manner; can also mean arrogant or putting on airs

To swear while talking; to use abusive or vulgar language in a continuous stream.

to grimace in pain or from fear, often with a distorted face

(colloquial) to talk drivel; to blabber; to talk nonsense

to show one's teeth or bare one's fangs; to make a face due to pain or to look fierce

smiling with the corners of the mouth stretched wide

(colloquial) faded or dingy white; washed-out and unattractive

To open the mouth wide; to grin or make a face by pulling the corners of the mouth back.

to open one's mouth and laugh; to grin or smile broadly