A good one is a sarcastically spoken term used to describe someone that is being/or is a big douche bag, an idiot, a cheater, a liar, a dumbass, or someone that is an outright fuck tard.
"Did you see that guy over there that thinks he's cool , but he only has 2 teeth? "That guy is a freaking good one! I would never date a good one such as that !
This is an extremely sarcastic response to someones lame joke or foolish comment.
It is over emphasized greatly to stress the point that the comment or humor they made was in fact "NOT, A GOOD ONE."
Often will annoy or hurt the person it is directed at, but that was the point in the first place! Sometimes it is followed by the persons name to further cut them down as in " good one hank!"
Harold: She was asking me to go out sometime, I wasn't sure what to say?
Gary: you should have said, " I can't go out because I am a reverse vampire and the night kills me"...
A phrase first heard in the BB gun/coming of age movie The Christmas Story. This can be applied whenever a child wishes to butter up his father in order to gain a favor. Over reaching laughter and enthusiasm follows when a marginally funny line is uttered by the dad. It's usually a blatantly transparent attempt as the favor is requested only a short time after the "good one, dad."