Well, how crappy it is, is quite essential here. 😅

A non-crappy game, which is significantly more fun with friends, is what I would simply refer to as a "multiplayer game".
Particularly simple games might also be deemed good "party games" (because you can simply chuck someone a controller and they can participate). But Overcooked also has a campaign mode, so I'd say it's somewhere in between.

Well, and it doesn't use stock textures/models, it doesn't have funky/funny physics bugs etc., so I wouldn't say Overcooked is crappy, which is why I personally would not deem it "friendslop" at all...