1. any decapod crustacean of the suborder Brachyura, having the eyes on short stalks and a short, broad, more or less flattened body, the abdomen being small and folded under the thorax.
2. any of various other crustaceans, as the hermit crab, or other animals, as the horseshoe crab, resembling the true crabs.
3. Crab,
• the zodiacal constellation or sign Cancer.
• the Crab Nebula.
4. any of various mechanical contrivances for hoisting or pulling.
5. the maneuver of crabbing.
6. the crab louse.
7. crabs,
• a losing throw, as two aces, in the game of hazard.
• pediculosis.

8. to catch or attempt to catch crabs.
9. to move sideways, diagonally, or obliquely, especially with short, abrupt bursts of speed; scuttle.
10. (of an aircraft) to head partly into the wind to compensate for drift.
11. to drift or advance with some movement sideways, especially when under tow.

12. to move (a vehicle or object) sideways, diagonally, or obliquely, especially with short, abrupt movements.
13. to head (an aircraft) partly into the wind to compensate for drift.

14. to make a faulty stroke in rowing, so that the oar strikes the water forcibly on the backstroke.

1. a crab apple fruit or tree.

1. an ill-tempered or grouchy person.

2. to find fault; complain.
3. (of hawks) to claw each other.

4. to find fault with.
5. to make ill-tempered or grouchy; embitter.
6. (of a hawk) to claw (another hawk).
7. to spoil.

1. any chiefly marine decapod crustacean of the genus Cancer and related genera (section Brachyura), having a broad flattened carapace covering the cephalothorax, beneath which is folded the abdomen. The first pair of limbs are modified as pincers
2. any of various similar or related arthropods, such as the hermit crab and horseshoe crab
3. short for crab louse
4. a manoeuvre in which an aircraft flies slightly into the crosswind to compensate for drift
5. a mechanical lifting device, esp the travelling hoist of a gantry crane
6. wrestling See Boston crab
7. to make a stroke in which the oar either misses the water or digs too deeply, causing the rower to fall backwards

8. to hunt or catch crabs
9. to fly (an aircraft) slightly into a crosswind to compensate for drift
10. to move forwards with a slight sideways motion, as to overcome an offsetting current
11. to move sideways

1. to find fault; grumble
2. to spoil (esp in the phrase crab someone's act)

3. an irritable person
4. to attract unwelcome attention

1. short for crab apple

1. the constellation Cancer, the fourth sign of the zodiac

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