slap

a face like a slapped arse: seearse.

slap and tickle physical amorous play. British informal

a slap in the face (or eye) an unexpected rejection or affront.

2013New Zealand Herald One Maori media outlet snubbed last week's competition, saying the lack of full access was a slap in the face.

slap on the wrist a mild reprimand or punishment.

2013CNN transcripts To think that he caused all of these deaths through, you know, essentially he deliberately drank all of this alcohol, a huge amount, and caused this accident. And to get a slap on the wrist I think is just stunning and shocking to the public.

slap someone on the back congratulate someone heartily.