Example: Don't worry about your DUI. We will hire a cracker jack attorney and get you off.
Origin: "Crack" means of superior excellence of ability as in "he's a crack shot" meaning excellent, superb. "Jack" being like "Joe", a common man. "Cracker jack" thus means a Superb man, any man.
Curiously "cracker" is defined as a bragging liar, which is very much in contrast to "cracker jack" which implies someone who delivers.
Example: I don't want to hear the story from the beginning. Cut to the quick and tell me the trash.
Origin: "Quick" is actually defined as meaning flesh or skin.
That definition has survived in reference to the fingernail. The "quick" is the part of finger, beneath the nail, that relies on the nail for protection. If you cut your fingernail too short and (painfully) expose the tender flesh beneath, you have cut it to the quick.
In hand to hand duel or battle a combatant who wished to taunt his opponent, might intentionally cut through the clothes or armor "to the quick". The act of cutting through clothes to the flesh is to cut through the insignificant to the substantial.
If someone cuts you with a knife but it's a shallow wound and inconsequential, then you wouldn't use this phrase. If they cut you deeply, or stabbed you, then you might say they'd cut you to the quick. Again this is cutting though the inconsequential to the meaningful.
This may also be related to the use of the word "quickening" to describe the hypothetical moment when a fetus becomes a baby. This term and idea were once very common in both Anglophile Europe and the Americas.
In either case, there is a clear meaning of penetrating the dead, dull stuff and getting to the live, important bits. This translates very nicely to the most common use of the phrase today, to mean skipping to the important part of a story or explanation.
Meaning: A person skilled at cheating or swindling others.
Example: Many people view car salesmen, lawyers, and con artist as one and the same.
Origin: "Con" is short for confidence. A con artist gains the trust and confidence of the victim. After gaining the trust, the con artist cheats the victim, betraying the trust.
