Limp is an acronym for "Legends Immune to Mediocre Pussy." Limp is a noun referring to someone (typically a male) that would barely lift a finger to impress a woman (or anyone of interest). It is the opposite of a simp. What makes a limp special is their outright refusal put in any effort to attract women even if they would get something out of it. They evenreject common chivalries on principle. This is a conscious effort enforced by the limp's values that encourage him to be anti.
I wish Jacob would get over himself. He says he wants a girlfriend but he won't even court a girl for whatever reason. He is such a limp.