(intransitive) To fish for crabs. / (transitive, US, slang) To ruin. / (intransitive) To complain. / (transitive) To complain about.

The crab apple or wild apple. / The tree bearing crab apples, which has a dogbane-like bitter bark with medical use. / A cudgel made of the wood of the crab tree; a crabstick.

The tree species Carapa guianensis, native to South America.

A crustacean of the infraorder Brachyura, having five pairs of legs, the foremost of which are in the form of claws, and a carapace. / (uncountable) The meat of this crustacean, served as food; crabmeat.

(Canada, US, South Africa) The shore crab.

A cobia, Rachycentron canadum. / A crab-eater seal, Lobodon carcinophagus, which eats krill (not crabs).

A type of crab (Carcinus maenas) native to the coasts of Europe and North Africa.

Any of various species of crab of the superfamily Majoidea with long legs / especially, the true spider crabs (family Majidae).

(idiomatic, Philippines) A way of thinking best described by the phrase "if I can't have it, neither can you." The metaphor refers to a pot of crabs in which one tries to escape over the side, but is relentlessly pulled down by the others in the pot.

(uncountable) A spice mixture used to flavor the water in which crabs or other shellfish are boiled. / (countable) A social event where boiled crabs are eaten.