Noun

1. Decapod having eyes on short stalks and a broad flattened carapace with a small abdomen folded under the thorax and pincers
2. A quarrelsome grouch
3. (astrology) a person who is born while the sun is in cancer
4. The fourth sign of the zodiac; the sun is in this sign from about june 21 to july 22
5. The edible flesh of any of various crabs
6. A louse that infests the pubic region of the human body
7. A stroke of the oar that either misses the water or digs too deeply

Verb

1. Direct (an aircraft) into a crosswind
2. Scurry sideways like a crab
3. Fish for crab
4. Complain