to finch (vb.) Share definition Flag to be a professional teacher and cock slap another teacher while haveng sex on the job. he finished with her then finched her across the cheek . to finch (vb.) to finch (vb.) by Jung - Spaniard March 5, 2009 0 0 Get merch Get the to finch (vb.) mug. Buy Now — $32.95 See more merch