Difference between Give someone five and Give someone high five

give someone five—(coll.)

1. (also: give someone a hand) help a person:

• Hey, give me five over here for a minute, will ya?

2. slap smb.’s raised palm in greeting or as a congratulation:

• Reno put out his hand for me to give him five.

give someone high five— = give someone five 2:

• The guy at the door said goodnight and Billy turned around and gave him high five.

See also: take five / take the fifth.