chaff \chaf\, noun, verb:
1. the stiff strawlike part of grains such as wheat, oats, rye
2. to make good-natured fun of someone
3. worthless material; detritus
Chaff is separated from the grain by threshing.
It's hard to separate the chaff from the wheat sometimes.
The kids chaffed the exchange student for her mistakes in grammar.
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