Grubsnark
n. One who pontificates to those who know more about the subject. An arrogant beggar. v. To pontificate to the more knowledgeable. To beg as if doing the victim of one's begging a favor for which they should be grateful.
Before I could shut him up, he started grubsnarking his silly idea about quantum entanglement to a couple of particle physicists.
Get the Grubsnark mug.