Drake is picking sides in the upcoming Jake Paul and Nate Diaz fight ... placing a bet on The Problem Child to fall short ... and judging by the massive wager, Champagne Papi's feeling confident.
Drizzy posted the Stake betting slip on social media Friday night ... and he's risking $250,000 to win $1 million. In order for Drake to cash out, Nate has to win his fight with Paul.
Here's how Drake's explaining his bet .