1. Someone who is intentionally nice to a person to get something out of them.
2. Someone who is extremely attracted to a person, and is kind to them.
3. Someone who is creepy and obsessed with a person.
ie: you are a stupid, simple person for misunderstanding the meaning of the word.
'All these Simp's keep making up their own definitions for a word already established.'
Josey " My friend is such a Simp, he buys me everything and we don't even fuck!' Josey's friend " That doesn't even make sense, shut the fuck up you Simp'