noun
plural crabs
[count] :a sea animal that has a hard shell, eight legs, and two large claws - see color picture - see also hermit crab, king crab
[noncount] :the meat of a crab eaten as food
crabs [plural] medical :a medical problem in which very small insects (called lice) live in the hair surrounding a person's sexual organs
[count] US informal :an unhappy person who complains a lot :grouch
verb
crabs; crabbed; crabbing
[no obj]
to catch or try to catch crabs
US informal :to complain about something in a way that annoys people
US