A superhero homeless person.
Skippy the wonder bum saved New York City from a meteor
by EllaGetsA5 November 04, 2009
1 more definition
The British answer to WonderBra! Butt bra that enhances the buttocks.
'Binikis' are wonderbums that come in two pieces: the lower piece accentuates the butt for that 'fuller', uplifted look.
by hammer---;, hytham April 10, 2007