Noun. The expression on the face of someone taking it in the ass.
Yeah baby, show me your illingworth.
by anon April 10, 2005
Verb. To display a camp look of complete stupefied blankness in response to a concept, event or word.
I asked him where his metatarsals were and he just illingworthed.
by Phish April 07, 2005
A word often substituted for 'dipshit'.
Ah man why would you do that? You are such an illingworth!
by omnomnom123 April 22, 2009