high five
noun
: a slapping of an upraised hand by two people (as in celebration)
gave each other a high five after the winning goal
high-five
ˈhī-ˈfīv 
verb 
Example Sentences
People began cheering and giving each other high fives.
Word History
First Known Use
1980, in the meaning defined above
Kids Definition
high five
noun
: a show of celebration by two people slapping each other's hands in the air
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