to talk incessantly, and at length, AT another person, trapping them in the situation and not allowing them time to reply.

a person sermonising to another, perhaps when drunk, who cannot be steered towards to a different topic, is said to have he audience in a verbal headlock.
"she was really mad, had me in a verbal headlock for an hour."

"my ears are bleeding! he didnt shut up, i was in a verbal headlock"
by sonbee1 November 28, 2009
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