A major oversight or obvious err in judgement or planning. As in the movie National Lampoon's Vacation, the Griswold family drives cross-country to Wally World theme park to find that it was closed. Or, failing to see an obvious easier route, short-cut, shorter line or less crowded approach to anything while preoccupied following the masses. "Stupid tourist, sheep, rookie mistake".
After spending nearly an hour looking for parking, Ves realized his Griswold mistake of shopping at the mall on the weekend.
One who is particularly particular about the accuracy of grammar, punctuation and syntax.
Tony:"At the end of a sentence, should I use a single space or two?"
James:"I heard people are now using just one."
Chris:"What?? That's crazy, I was taught it was ALWAYS two!!"
Muffy:"Dude, just ask my professional writer/columnist/blogger friend Mandy, she's a total grammando, so she should know."
To pun pugnaciously. Whereas "pun"-a play on words with a comical twist and "pugnacious" -eager or quick to argue, quarrel, or fight.
To use puns in such a manner that indicates you are armed with a verbal arsenal and are not afraid to use it. The feeling of wanting to get a funny dig in on someone.
The comedian made sarcastic punacious comments about Kim Kardashian being pregnant by one guy while still being shortly married to another.