Feb 16th 2010 5:35PM Damage that is so ridiculously high or constant that it is, for all practical purposes, unhealable. The healer just can't keep up with the damage, and even if the healer does manage to keep up with this damage, all possible cooldowns were likely used and won't be ready in time for the next batch of unhealable damage.
Feb 14th 2010 2:39PM cleave in a comp name typically means focusing one target down very quickly, and originally applied to heavy melee teams (warrior/rogue/druid). 2345 is exactly what peeeriest said. Comps like TSG come from the name of the team who first played it. wiz cleave is basically the same thing as any other cleave team except with huge magic damage instead of melee.