From Longman Dictionary of Contemporary Englishwillywil‧ly /ˈwɪli/ noun (plural willies) [countable] British English informalHBH a penis
Examples from the Corpus
willy• Big noses, Martha thought mercilessly, were supposed to indicate big willies.• It is enough to give anybody the World Cup willies.• My dad wasn't a tall man and it only just covered Quigley's enormous willy.• Singer Ange has got guts, he did get his willy out on stage once.• They grabbed that Martian's willy from my little hand.• I suppose you talk about men's willies and all that sort of thing?• Had all the big men got the willies together?• Your willy shrinks because speed is a vasodilator and opens up your blood vessels. 