So around 2012-2015 I watched an indie movie on Netflix and I always think about it but I can never think of what it's called.

It follows a group of friends and one of them passes out (I think gets too drunk at a party) and the twist at the end is they forgot about that friend and he is dead in a dumpster

I vaguely remember a butterfly on the cover but I could be wrong. I also think they have this s***ty van

That's all I can remember