Two NBA stars are forcing each other to sleep with one eye open ... 'cause they keep LOTION-BOMBING each other.
It all started over the weekend when Brooklyn Nets star Marquis Teague caught his former Kentucky teammate friend Doron Lamb passed out ... and hit him with some lotion to the head. Teague posted the pic on Instagram.
But Lamb -- who now plays for the Orlando Magic -- decided to strike back ... quickly.
Just hours later, when Teague passed out ... Lamb escalated the situation -- squirting lotion all over Teague's face, hand and arm.
Usually, this kind of passed-out debauchery is reserved for people who pass out with their shoes on ... at least, that's how it goes in college.