circular firing squad
A group, usually a political party, that is allied against a common enemy or opponent but whose internal disagreements and attacks end up doing more damage to each other than to their target. The lead up to the presidential nomination saw the party devolve into a circular firing squad, as each candidate's vociferous bid to unseat the incumbent president ended up creating huge divisions and disarray within the party itself.
goon squad
A group of people hired or acting for the purposes of enforcement, protection, intimidation, and/or harassment on behalf of someone else. Primarily heard in US. After Mr. Smith refused to pay the mafia protection money, they sent a goon squad around to rough him up.
squad
One's group of close friends. I'm going to the party tonight with my squad.
squad goals
The aspirations, desires, or values of one's group of close friends, often illustrated in an image posted on social media that is captioned with the phrase as a hashtag. Check out this selfie of Jenny and her friends at the library. She hashtagged it with "squad goals." See you all bright and early tomorrow at the protest! #squadgoals