What is the meaning of Crabbed?

Bad-tempered or cantankerous.

Cramped, bent.

Crowded together and difficult to read.

Pointed at an angle to the runway during approach and landing to compensate for a crosswind.

Performed with one's aircraft pointed at an angle to the runway to compensate for a crosswind; performed with nonzero crab.

simple past and past participle of crab

immoral, backwards, savage, rapacious

crabbed, ill-tempered, vengeful

Moving in reverse.

Source: wiktionary.org