Bae is the evolved form of the English word "babe," and was made popular by internet communities and rap culture mainly in 2013 but saw its humble beginnings in 2005. It means "poop" in Danish but has been used in the English language for various reasons since the 15th century (Google Ngram Viewer).
Can also be used as an acronym meaning "Before Anyone Else."
Hater: "I hate it when people use the word bae. They sound so ghetto."
Shakespeare: "Why? I beareth new vocabulary in ev'ry script. I created modern English."
Darwin: "Evolution, my dear hater."
Rap Artist: "You see my house on MTV last week? That look like the ghetto to you?"
Internet: "Bae sounds so cute. But I don't want to use it because I'm afraid of being hated and judged. Why can't haters just respect other people's dialect and keep their opinions to themselves?"
8👍 17👎