neckfrog Share definition Flag a frog that is stuck to the side of a human's neck. friend1: hey friend, that is one kickass neckfrog you have. how much did that set you back? friend2: it was free. neckfrog by whoadie whoener November 17, 2003 0 0 Get merch Get the neckfrog mug. Buy Now — $32.95 See more merch