It's not very funny. Or good. But it has Kristen Wiig in it.
Will Arnett and Will Forte play John and Dean Solomon, two young brothers living together in a nameless city. For reasons too tedious to go into, they completely lack social skills. The movie doesn't make it clear whether they're also inordinately stupid, but I vote "yes" on that score too.
So they have a difficult time dealing with women. But, as luck would have it, they perceive a need to produce a grandchild for their father, who's lapsed into a coma.
The "stupid people are funny" genre has a long history, and I don't suppose it's going away anytime soon. But there's not much beyond that here.
Well, except, as I said before, Kristen Wiig. She's awesome.