Coinfirm Share definition Flag The act of getting agreement to your question or request due to a cash payment. The survey lines were coinfirmed in my favor by the public assessor's office and the dispute from the opposing party was thrown out. Coinfirm by Pun House Victim November 18, 2010 0 0 Get merch Get the Coinfirm mug. Buy Now — $32.95 See more merch