I'm sorry, but that can't compare to the Waitomo Airtruk (seen briefly at the end of 'Mad Max 3: Beyond Thunderdome'):

It
does have serious competition from the Westland-Hill Pterodactyl V, though:

And for sheer lunacy, there's always the Vedo Villi:

But in more common ugliness, there's the Potez 75:

or the Fleet Shadower:

or the P.Z.L.W.S.4 'Zubr':

or the Blackburn F3:

or the Camproni Stipa:

or the Il-20 'Gorbun':

There have been immense amounts of ugliness perpetrated on the skies, but only a few
really qualify to have gotten into the air only because they were repelled by the ground...