Longman Dictionary of Contemporary English homepage

Sense: 1-3
Origin: Old English crabba
Sense: 4
Date: 1800-1900
Origin: crabbed

crab

noun
     
crab
Related topics: Food, Biology
crab
1 [countable]HB a sea animal with a hard shell, five legs on each side, and two large claws [↪ crustacean]
2DF [uncountable] the flesh of this animal that you can cook and eat:
crab meat
dressed crab (=prepared for eating)
3

crabs

[plural] informalMI a medical condition in which a type of louse (=insect) is in the hair around sexual organs
4 [singular] American English informal someone who becomes annoyed easily about unimportant things

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