From WordNet (r) 3.0 (2006) [wn]:
high-five
n 1: a gesture of greeting or elation; one person's upraised
palm slaps the upraised palm of another person
From WordNet (r) 3.0 (2006) [wn]:
high-five
n 1: a gesture of greeting or elation; one person's upraised
palm slaps the upraised palm of another person