thumblepenis Share definition Flag A penis roughly the size of Thumbelina. Oftentimes, people with a Thumblepenis are mocked. Hey, did you hear Ryan is a thumblepenis? He has to tie that rubber off like 8 times! thumblepenis by Bawls to the Walls December 6, 2006 0 0 Get merch Get the thumblepenis mug. Buy Now — $32.95 See more merch
