Our photog spotted Tiffany and her friends Sunday at LAX and apparently watched as she loaded up a slew of bags into an SUV. Once the bags were in the back, we started asking questions.

Tiffany wasn't playing ball, and she's now furious at the lack of chivalry.

Truth is ... our camera guy was just doing his job -- which doesn't include loading luggage -- but there's always room to lend a helping hand.