Soon I expect to have to explain Jeep

The following is a heavily edited version of a conversation in the car on the way back from a party this afternoon.

Me: What were you guys playing?
The boy: A LARP set in a spaceship.
peaseblossom: What made it a LARP?
The boy: We have gms and stuff.
Me: Like character sheets?
The boy: Dad we're not doing tabletop.
Me: So its basically a game of pretend.
The boy: Please dad, we haven't called it pretend since we were 5.

peaseblossom and I then proceed to explain why a LARP requires rules to be a larp and the continuum of pretend.