[drivebyacct2]

No, it simply means know what you're talking about. If you disagree with someone, argue and debate, don't resort to (GP, come on) shitty debate tactics of someone with their back against the wall --- it happens here, on reddit, in real life. If you're adamant about your position and the other person can't formulate a coherent or relevant response then you should be prepared to be accused of "being madbro." or have "Ad hominem" or "Straw man!!!" shouted at you as the other person uses that to "win" and exit the conversation.