high five

n.

A celebratory or mutually congratulatory gesture between two persons performed by each slapping the other's raised right hand.

Also used as a verb.

Give me five!

Idiom (mainly American, informal)

Something that you say when you want someone to hit your open hand with theirs, in order to greet them or to show how pleased you are.

handcuffs

pl. n.

A restraining device consisting of a pair of strong, connected hoops that can be tightened and locked about the wrists and used on one or both arms of a prisoner in custody.

Synonym:

cuffs, handlock, manacle.