the opposite of uptard. if something is being downtarded it means that the conversation has moved from nonsensical babbling to a more refined mumbling of sorts.
Bryan: I once peed myself
Andrew: Shakespeare once wrote a sonnet about urination. He called it the divine tragedy of the man who could not tinkle.
Jon: Phew, way to downtard that to a higher level of thinking for that could of gone in a much worse direction.