What is the meaning of Squab?

A baby pigeon, dove, or chicken.

The meat of such a baby bird used as food.

A baby rook.

A thick cushion, especially a flat one covering the seat of a chair or sofa.

A person of a short, fat figure.

To fall plump; to strike at one dash, or with a heavy stroke.

To furnish with squabs, or cushions.

To stuff thickly and sew through, the stitches being concealed by buttons, etc.

Fat; thick; plump; bulky.

Unfledged; unfeathered.

Clumsy.

Curt; abrupt.

Shy; coy.

With a heavy fall; plump.

Source: wiktionary.org