spanking

To beat, smack or slap a person's buttocks, with the bare hand or other object, as punishment, gesture, or form of sexual interaction.

To soundly defeat, to trounce.

To hit very hard

A form of physical punishment in which a beating is applied to the buttocks.

"Domestic spanking is often endured over the knee (or lap), formal spanking rather applied over a contraption such as a tresle or A-frame, with or without constraints"

An incident of such punishment, or such physical act in a non-punitive context, such as a birthday spanking.

Fast and energetic.

"a spanking pace"

Brisk and fresh.

"a spanking breeze"

(now usually with “new”) An intensifier.

"a spanking good time"