Nick Young -- Gets Out-Freaked by Iggy Azalea (VIDEO)

Nick Young gave his Lakers teammates a huge gift when he attempted to out lip-synch his fiancee, Iggy Azalea ... and lost ... in humiliating fashion.

Nick and Iggy went head-to-head on last night's episode of "Lip Sync Battle" on Spike -- and turns out Nick wasn't so Swaggy after all.

Azalea whipped out her "Freak Me" by Silk -- complete with pelvic thrusts on the stage. Nick tried to go sweet with Maroon 5's "Sugar" ... but came up short.

The real winner here wasn't Iggy though -- it's the Lakers who just got handed a season's worth of images to post in Nick's locker.