The player you are asking that question to has not logged in since end of July so I don't know how likely you would be to get a response.
The first macro is a macro which combines Heroic Throw and Charge.
Charge since it is not on the GCD can be executed at the same time as Heroic Throw. Since you are talking about a scenerio where multiple mobs are being tanked at once it is likely a macro to the effect of:
Where the Heroic Throw is used on a target different than the Charge. Since you Charge one of the two targets and enter melee range with that target, you would likely have that be your current target so you don't need to retarget after charging. That means Heroic Throw likely uses a separate target such as mouseover. This is probably not the exact macro that individual is using, but it is likely something similar to this.
/cast [@mouseover,harm,nodead]  Heroic Throw
The second macro is to execute Cleave at the same time as Revenge. Cleave and Heroic Strike share a cooldown with each other but not with any other ability so they can be executed in combination with another ability (they aren't on the GCD). In this case the macro is likely something simpler.
They simply bind the usage of Cleave to when they use Revenge. Again their macro may not have looked like this exactly, but it was probably something along these lines.
As for the actual usefulness of either of these macros I'll leave that up to you.
"In anything, if you want to go from just a beginner to a pro, you need a montage." /w TankSpot WTB Montage for Raiders.