What does it mean when a guy says to jump on it?

Answer 1

When a guy says to jump on it, he usually wants to have sex (with the girl on top).

Answer 2

"Jump on it" is a colloquial phrase often used to suggest taking action or engaging with something enthusiastically or without hesitation. In some contexts, it can be a playful or flirty way of encouraging someone to pursue a romantic or physical connection.