1. n. A crustacean of the infraorder Brachyura, having five pairs of legs, the foremost of which are in the form of claws, and a carapace.
2. n. The meat of this crustacean, served as food; crabmeat
3. n. A bad-tempered person.
4. n. (in plural crabs, informal) An infestation of pubic lice (Pthirus pubis).
Although crabs themselves are an easily treated inconvenience, the patient and his partner(s) clearly run major STD risks.
5. n. (slang) A playing card with the rank of three.
6. n. (rowing) A position in rowing where the oar is pushed under the rigger by the force of the water.
7. n. A defect in an outwardly normal object that may render it inconvenient and troublesome to use.
8. v. (intransitive) To fish for crabs.
9. v. (transitive, US, slang) To ruin.
10. v. (intransitive) To complain.
11. v. (intransitive) To drift or move sideways or to leeward (by analogy with the movement of a crab).
12. v. To navigate (an aircraft, e.g. a glider) sideways against an air current in order to maintain a straight-line course.
13. v. (obsolete, World War I), to fly slightly off the straight-line course towards an enemy aircraft, as the machine guns on early aircraft did not allow firing through the propeller disk.
14. v. (rare) To back out of something.
15. n. The crab apple or wild apple.
16. n. The tree bearing crab apples, which has a dogbane-like bitter bark with medical use.
17. n. A cudgel made of the wood of the crab tree; a crabstick.
18. n. A movable winch or windlass with powerful gearing, used with derricks, etc.
19. n. A form of windlass, or geared capstan, for hauling ships into dock, etc.
20. n. A machine used in ropewalks to stretch the yarn.
21. n. A claw for anchoring a portable machine.
22. v. (obsolete) To irritate, make surly or sour
23. v. To be ill-tempered; to complain or find fault.
24. v. (British dialect) To cudgel or beat, as with a crabstick
25. n. The tree species , native of South America.
