The act of constantly saying "no" or "no, thank you" or "I don't need that" to sales people who persistently try to up-sell you additional services or add-ons during a point of sale or negotiation of service(s).
So after 10 mins of playing up-sell defense I am totally exhausted. Mind you, I just want a car wash. If I wanted to get up sold and haggled out, I would have gone to the swap meet for some churros and butterfly knifes. How many times to I have to say no, I don't want that super wax?