Definition (Noun): Webster's Dictionary definition (Actual) : a small group engaged in a common effort or occupation Urban Dictionary definition (Slang) : Crew, posse, gang; an informal group of individuals with a common identity and a sense of solidarity
Word in Sentence: 1. The squad was going around after school.
2. Hey man, do you want to hang with the squad this weekend?
Etymology: This word originated in France but at the time it was meant to mean a group of soldier in the military. It wasn't until the late 2000's that the word started to be used for slang.
How it Spread: Squad was reincarnated in big cities on the East Coast and spread through out the U.S. because of the popularity it gained in such little time.
Why it is a Slang Word: This became a slang word because people needed a word to call their group of friends.