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An amalgamation of "Numbskull" and "Skullduggery". Can be employed to describe an amusing, risqué, or banter-incucing act, as perpetrated by a numbskull.
Although not in common usage, would work best used by an Englishman, ideally a gentleman from the East End of London.
"Wot on the Sweet Lord's green erf joo fink you woz ap to larst night 'Arry?"

"Wojoomean boss? We wos jus 'avin a larf. Not mar fault the boys in blue turned ap!"

"Well yore faakin' numskullduggery nearly got us locked ap you tit!"
by Kilpin May 14, 2007
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