squab

noun

A young, newly hatched, or unfledged pigeon.

A soft, thick cushion, as for a couch.

A couch.

adjective

Young and undeveloped; newly hatched or unfledged.

To fall plump; strike heavily; flap; flop. They watched the street, and beheld ladies in … short cloaks with hoods squabbing behind (known as cardinals).