tallywacker Ask Urban Dictionary about tallywacker Share definition Flag A bloke with an enormous penis which he is able to swing over his shoulder. See also see www.tallywacker.co.uk Man, look at the tallywacker on him - im gonna go jump off a cliff tallywacker by Batman September 5, 2003 0 0 tallywacker Merch Get the tallywacker mug. Buy Now — $32.95 See more merch