Fall Boys Ultimate Knockout is a sumo-style elimination game: everyone is on a platform, and the way to remove someone is to grab them and throw them over the edge. There's no health bar — you're either on the platform or you aren't.
That makes positioning everything. Standing near the edge is dangerous, standing in the middle means everyone can reach you, and grabbing someone leaves you exposed to whoever is behind you.
Grab them — best done from behind — and throw them off the platform. There's no damage system; falling off is the only way out.
Position. Fighting near the edge means a single throw wins, and letting two opponents grapple before taking the survivor is the reliable approach.
Yes — it runs in the browser with nothing to install.