simp

Meaning

1. A person who is overly attentive or submissive toward someone they are attracted to.
2. (verb) To act that way toward someone, usually without getting anything back.

“He bought her flowers for the third week straight. Classic simp behavior.”

Where it came from

The word surfaced in 1940s American slang as a shortening of simpleton. Gaming forums and Reddit revived it around 2017 and 2018 as an insult for over-eager fans, and TikTok’s #simpnation trend spread it to a much wider audience in 2020.