Pipecleaner Share definition Flag The act of inserting one's penis into another man's penis through the urethra. After Jack and his boyfriend did the pipecleaner, he had to see a urologist it was streched so much Pipecleaner by queondaguero July 1, 2011 0 0 Get merch Get the Pipecleaner mug. Buy Now — $32.95 See more merch