Been playing since launch, got a Mongol before an It's Piss grenade

I don’t farm Thunk and Sloth constantly, but come on, that’s ridiculous. I have never once seen an It’s Piss grenade, and I’ve maxed out and farmed up on each vault hunter!

Makes me wonder how many other legendaries I’ve never seen, but the pp grenade is one I’ve actively farmed for.