1. A remark of sarcasm or disbelief. Used upon learning of another person's stupidity or foolishness. (Note extent of stupidity should be great enough to warrant a response of "You Best!")
14 September 2011, 2.49 pm. Actual conversation between KENJI and ABIGAIL via SMS
Kenji: I'm seeing the doctor now, have to change my dressing.
Abigail (thinking he broke a limb): Huh??!! What happened?!
Kenji: Burnt my toe when playing with sparklers. The sparklers dropped on my toe haha!
Abigail: -_- You Best.