move sideways or obliquely

he began crabbing sideways across the roof

fish for crabs

watermen were crabbing on the bay

a crustacean, found chiefly on seashores, with a broad carapace, stalked eyes, and five pairs of legs, the first pair of which are modified as pincers

a louse that infests human body hair, especially in the genital region, causing extreme irritation

a machine for picking up and lifting heavy weights

grumble about something petty

on picnics, I would crab about sand in my food

act so as to spoil (something)

you're trying to crab my act

a small sour apple

the small tree that bears the crab apple