Okay kiddo, Oscar's Grind is a betting strategy that some grownups use when they play casino games like roulette or blackjack. The goal is to try and win a little bit of money each time you place a bet.
So, imagine you start with $1. You make a bet and if you win, you add $1 more to your total. If you lose, you keep your total the same. You keep doing this, betting $1 more each time you win, until you have won a predetermined amount of money or until you lose a bet.
It's like climbing up a small ladder, one step at a time. Each time you win, you move up a step on the ladder. If you lose, you stay put until you win again.
The idea behind Oscar's Grind is that it helps you stay in the game longer and hopefully win a little bit of money without risking too much all at once. But remember, gambling is never a sure thing and you should always only gamble with money that you can afford to lose.