pound

In our family we call a fist bump a "pound"
"Pound Me!"I was going through the girls' clothes with them yesterday to see
what fits and what doesn't. While trying on a long-sleeved shirt
Jane got frustrated because her hand was stuck and couldn't come
out the sleeve. In Jane's most frustrated voice she kept yelling,
"My Pound! My Pound!"
(referring to her stuck hand)

A "pound," a "fist" .... same thing.