Weaksuck Puke
Weaksuck puke describes someone that their actions, abilities, arguments, or positions are so weak and feeble minded that it makes anyone that comes in contact with them want to vomit (puke) profusely. Weaksuck pukes, can be conservative, liberal, atheist, agnostic, bible thumpers. Weaksuck puke has no boundaries.
John is such a weaksuck puke, he drags totally unrelated topics into an argument because he can't discuss the original topic at hand due to his complete lack of knowledge on the original topic.