To add one's own name to the list of people who are participating in something (including amateur, but not professional, teams)
To agree to purchase some good or service.
To add a name to the list of people who are participating in something.
To act as part of, or on behalf of, a squad.
Sloppy mud.
One's friend group, taken collectively; one's peeps.
A unit of tactical military personnel, or of police officers, usually of about ten members.
A group of potential players from whom a starting team and substitutes are chosen.
A collective noun for a group of squid.