HOw do i erase a discussion?

I'm sorry but I think you can't erase your past discussion, myLot don't have that feature for us, it is in the administrator hand. Usually discussions that will be erased is the discussion which contain violation to the guidelines, beside of that some discussion will remain here to watch almost forever as long as admin think your discussion still have possibility to attract responder. So, don't bother to think about the past, just make another discussion, the past should remain in the past.