Luck Box 

Used to account for one's surprisingly good fortunes or previously unknown talents. A way to rationalize when something happens that far exceeds the known abilities of someone or something.

I thought going into the fantasy football draft this year that it would be a total crapshoot, but I was able to luck box a crenshaw team that is rock chalk to win the championship.

Luck Box by Dave.R. July 1, 2006

Luckbox 

A person so full of luck in poker that it is disgusting and ridiculous. There is surely some skill involved, but a luckbox will demonstrate more luck mixed in with that skill than any other player.....ever......in the history of the world......even more than Chris Moneymaker, which is just absurd.

Player 1: I just caught a flush on the river to win a 500 dollar pot! The other guy had Aces but I cracked them good!
Player 2: Stfu you luckbox.

Luckbox by Definately NOT a luckbox July 26, 2004

Luckbox 

Someone who has absolutely no skills in poker, plays like a fish but gets there every time, someone you love and hate at the same time at a poker table.

'Hey Chris I heard you got sucked out by Jimmy again'
'Yeah, he is suck a fucking luckbox, I am so tiltied'

Luckbox by The Ultimate Crusher July 7, 2016

Luckbox 

What a dumbass poker player, who only plays strong hands and almost systematically all-in, calls a gambler, who sometimes calls with speculative hands and a higher stack, when the latter wins the pot.

NL Omaha 8 tournament, final table, blinds 25-50

Gambler (3000$): 4567 limps in
Tight player (1000$): A99K calls the SB

Flop: A 2 9

Tight player (with a set of nines and no low) shoves 500$

Gambler thinks for a minute and then raises all in (with a good LO draw and two straight draws)
Tight player calls immediately

Board: A 2 9 5 8

Gambler scoops the pot: HI 56789, LO 65421
Tight player writes: "you fucking luckbox"

Luckbox by Dr Bepi September 2, 2011