American EnglishWorldwide informal usageinformalcolloquial
An informal request for a 'high five' (a celebratory gesture in which two people slap an open hand together).
2.
Informal usage in various English dialectsinformalcolloquial
An informal request for the number five in contexts where 'five' refers to a specific item or unit (e.g., five dollars), though this meaning is secondary and context-dependent.