when someone says something so unreasonably foolish and stupid theres no way to reply to the statement they have just said so you
smack your lips making a 'mtchew' noise. it is also used to express annoyance, disappointment or some cases used to show in a friendly way distaste for a sarcastic remark. it is sort of a '
ugh' for black
people or used as a eye roll but as a word. the word is when your tongue is sucking your teeth/