Etymologically, it might be - it's not really clear. But the meaning is "to be (excessively) subservient to a person or cause" / "someone who is [...]". So a si

Etymologically, it might be - it's not really clear. But the meaning is "to be (excessively) subservient to a person or cause" / "someone who is [...]". So a simp/simping is (an accusation of) being (excessively) in favor of a person or cause, such as simping for a character, an idol, a real person, or a political party. Especially used for men who praise a certain woman over and over.