/mowth"fool'/ , n. , pl. mouthfuls .
1. the amount a mouth can hold.
2. the amount taken into the mouth at one time.
3. a small quantity.
4. Informal. a spoken remark of great truth, relevance, effectiveness, etc.: You said a mouthful!
5. a long word or group of words, esp. one that is hard to pronounce.
[ 1375-1425; late ME. See MOUTH, -FUL ]
Usage . See -ful .