lol this happened to me and my buddy the other day. He got camped hard by Xin/J4 top and apparently at one point J4 just sat in lane spamming the /l command because my friend couldn't really do anything to him. Every time they killed someone they'd spam laugh, and generally make really cocky plays just because they could, make fun of our bad plays while downplaying their own, etc.
Well anyways I got annoyed so I started tryharding with Hecarim, and our team started to beat them back as my friend farmed himself back into the game and got a shutdown on Jarvan with some help. At that point, I started spamming laugh on their corpses/when I was chasing them down to kill them. Snowballed my team, and during our last engage I demanded their presence in top lane. Jarvan actually showed up, and we ended up pretty much obliterating them at their base for the surrender. Of course, they had nothing to say by then. I actually have the replay for this, I just can't seem to view it in LoLreplay at all. :/ --- "When you want to be successful as bad as you want to breathe, then you'll be successful!"