szóstka w totka

Etymology
From the lottery game Toto-Lotek, later renamed to Duży Lotek and then Lotto, organized by Totalizator Sportowy. Participants must predict the results of a draw of six numbered balls from a set of 49, performed using a special machine.

Noun

 * 1)  correct guess of all six numbers in Lotto, resulting in main prize
 * 2)  jackpot; an extremely unlikely lucky event