by cupcake fiend June 12, 2008

by M3ga Bea5t September 13, 2020

by xannixon September 9, 2010

by WeeLynny October 19, 2017

A Knacker Flap is the large flap of skin prevailing from the gut that hangs over a males genitals, making them completely invisible when naked. The sighting of a Knacker Flap usually occurs in older obese men, and is usually tucked into their shirt. It is the male version of the "gunt" which is that of a female Knacker Flap.
Holy shit, that dude's got a mean Knacker Flap!
Omg is that guy naked? Where's his privates? Oh they're underneath his Knacker Flap.
Omg is that guy naked? Where's his privates? Oh they're underneath his Knacker Flap.
by purplejane September 8, 2014

Knacker is a term used for an (irish) gypsy. Fat knacker is another way of calling someone a fat (or greedy) gypo.
by anonymous September 27, 2020

by Nicola910 December 1, 2016
