high five

Short definition from Wiktionary

Noun

1. 1
   A gesture of celebration or victory in which two people slap the palms of their hands together at shoulder height or higher.
2. 2
   A game which uses a technique providing a user with an emotional reward after they complete a minor task or achievement.
3. 3
   The game of cinch.
4. 4
   Alternative form of high five.

Verb

1. 1
   To slap high fives.
2. 2
   Alternative form of high five.