He didn't say anything before that, just "God damn tiger" in shock. Not seeing what's shitty about that line in itself. I'm pretty sure most people would react with something along the lines of "what the fuck, that's a fucking tiger" in that position.
You got the first part completely wrong and didn't remember the second part, so how'd you know it was stupid?
The line was: "That widow is alive, guns ablazing!" Then his gun runs out of ammo and he says, "You taste that, Simon? That's the taste of shit."
Now if you think that's still shitty, that's fine. But that's Negan's character. He's over the top, says ridiculous/corny stuff and is going to be a staple on the show for a long time.
... Yep, I'm starting to realize that. Haha.
I'm been down on this show almost all season but there's definitely some "not paying attention" and nitpicking going on too.