Megan Thee Stallion's taking advantage of Klay Thompson's summer off-season ... the NBA legend was cryptically spotted in her new IG post -- and it's because they're dating!!!
The "Hiss" rapper has a win-win situation with her social media posts doubling as promo for her Hot Girl Summer swimwear line ... but Klay's "Where's Waldo"-esque cameo in the background of her poolside shot was hard to ignore!