EXCLUSIVE

Huge weekend for Kirk Cousins (besides that whole playoff loss thing) ... 'cause the Washington Redskins QB helped raise nearly $60k for charity ... all thanks to his famous "You Like That" quote.

Long story short ... the team asked Cousins if they could print the phrase on towels for fans to wave in the stadium during Sunday's game. He agreed with one condition -- put my charity's logo on it.

FYI, Cousins' cause is the International Justice Mission -- a global organization that protects the poor from violence in the developing world.

The good news ... thanks to the exposure on the towels, IJM raked in close to $30k in donations from fans on Sunday ... a rep for the organization tells us.

And it gets better -- 'cause the org. says a local wealthy couple has agreed to MATCH the number!

In total, the group raised $59,442 over the weekend ... plus, IJM says it's taken in another $50k overall from shirt sales and other fundraisers connected from the "You Like That?!" phrase.