What is the meaning of Spank?

To beat, smack or slap a person's buttocks or other vulnerable body part like the cheeks, with the bare hand or other object, as punishment, or for sexual gratification.

To soundly defeat, to trounce.

To hit very hard.

An instance of spanking, separately or part of a multiple blows-beating; a smack, swat, or slap.

A slapping sound, as produced by spanking.

An instance of masturbation.

To move quickly and nimbly on foot; to stride or run at a brisk pace.

To move or turn rapidly, as the gears of a machine or the sails of a ship.

To shoot out or throw violently; to hurl or knock out.

A leap or bound.

Source: wiktionary.org