scrum (rugby)
Standard rugby term for the formation where players pack together to restart play.
A scrum was formed in the rugby match.
huddle; locking arms (in a demonstration)
Extended use: a tight group of people linking arms, often in protests or team huddles.
The demonstrators marched in a huddle, locking arms.
The forwards formed a scrum and pushed against each other.
The protesters linked arms and formed a human chain.