Rob Kardashian & Mama June Only One Has Lost 100 lbs.

3/7/2013 3:45 PM PST
Reality stars Rob Kardashian and Honey Boo Boo's Mama June have guts ... to be so public with their weight battles.

Rob -- who has been working out hard trying to lose the 40 lbs. he gained since his breakup with Rita Ora -- showed off his manly curves in a clingy white t-shirt at the Clippers game in L.A. last night , while Mama June proudly showed off her slimmer physique on Wednesday ... after dropping 100 lbs. from not dieting and not hitting the gym.

Rob better redneckognize that sketti may be the new protein shake.