Used as sarcasm, if somebody tells you something like "that guy over there is cute" or "you don't like girls" then the other party might say in sarcasm LMTY (Let Me Tell Ya).
The ability girls and women have developed to hold several items at once in one hand. The skill has been developed due to the lack of pockets in women's clothing.
I thought she'd need multiple trips to carry her phone, keys, wallet, and Starbucks to her car since she needed the other hand to open the door, but she used her impressive girl grip to carry everything in one hand.