(n) A person-- often an affluent white male-- who is generally considered a douchebag, but surpasses others in terms of dishonesty and disregard towards other human beings.
Named for American politician, liar, and serial adulterer Newt Gingrich.
"We started calling her ex-boyfriend a newtchbag this week after discovering he was cheating on her with not one, but TWO women... and THREE men!"
"Ick... dang. Hopefully the prick never runs for president..."