barber slap 

A slap to the back of the head whenever some has gotten a haircut.

The only downside to getting a haircut.

Josh: Joe’s got a fresh trim.
Jack: Yeah I know I gave him a barber slap earlier.

barber slap by *Write Pseudonym here* November 26, 2019

barber slap 

A singular slap to the back of the neck when someone you know recently has a haircut within the past a day or two

Man, this haircut is awesome but I've been getting barber slaps all day

barber slap by Dreamon313 May 22, 2016