move sideways or obliquely

he began crabbing sideways across the roof

fish for crabs

watermen were crabbing on the bay

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

(of handwriting) very small and difficult to decipher

his handwriting is crabbed and hideous

bad-tempered

a crabbed, unhappy middle age