Verb:
To be able to get something by means of bartering or verbal adroitness.
Timlin? Yeah, that guy knows how to knack. I saw him talking to an Arabian correspondent and the next day we had an oil tanker show up mext to our tent.
Stacy: Did you hear that Naomi got back together with her ex for the 15th time?
Addison: Yeah, thats so knack of her. Wouldn't have expected anything else
Stacy: She's so knack