The Houston Astros spared no expense when it came to celebrating their World Series title this weekend ... TMZ Sports has learned they popped nearly $400,000 worth of 50 Cent's champagne during their postgame party.
We're told the team unloaded just over 250 bottles of the rapper's Le Chemin du Roi Brut ... right after they finished off the Philadelphia Phillies on Saturday night to win the Fall Classic.
In total, there were 250 bottles of Rose, 10 Magnums of the bubbly, and one, huge 15-liter bottle as well. The final bill for it all came out to $388,750!!
Of course, the 'Stros enjoyed every bit of it ... soaking in it for hours following their 4-1 win in Houston.
Star pitcher Lance McCullers Jr. seemed to get the most out of it though ... kickin' off Houston's epic celebration by coating his teammates in it first.
The Astros will continue the party later on Monday -- their championship parade is slated to go down at around 11 AM CT.
No word yet whether Fiddy's booze will be consumed there ... but it seems like a safe bet!