User blog comment:Lord Loss/Discussion of the Week: Lances/@comment-4775842-20120615230334/@comment-1011548-20120616160040

In MH context, 'broke' or 'broken' either means 'something so good or powerful that it removes all sense of challenge from the game' or 'something that happens in the game that the developers should have done something about but didn't'. People will argue bitterly to their last breath about what things in Monster Hunter are broken, but generally people agree that headlocking in MH1 is a bit broken. You might also hear people see MHFU's Plesioth's hipcheck is broken (that's the latter definition).

Apart from that, not much is agreed on... some might argue that Hammers are broken in MHFU because they do shit-loads of damage and the Superpound has a massive collision area. I've seen people on GFaqs argue Hvy Bowguns are broken in MHFU because they do loads of damage and it's hard to get hit yourself (those people were in a minority, though).

Personally, I think Slime element is broken in MH3, because everyone, their mum and their dog uses in gameplay videos. It happens regularly, does loads of damage, and normally causes a stagger. Just a bit broken.