When two people hit their knuckles together (when hands are in a fist). Many times used instead of a handshake or high-five.

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.

To beat the shit out of someone or something using your bare hands

1) fight
2) step up

To hit a person with your knuckles.

A synonym to pound it. It is a fist to fist contact in a congratulatory way. Often used to replace a high 5 or shaking hands.

Short for brass knuckles.