U: Selling Tongue

Up-Sell
The practise of proposing more of the same product when a customer asks for it. Typically used in the form of an additional enticement, such as a purchase economy of scale in the shape of a bulk-buying discount – “take an extra one and I’ll give you ten percent off overall”.

Urgency
What you create to bring forward the decision in your favour. Until the ink is dry and the money in your pocket a customer is not a customer. The sooner you gain commitment the better. 

Urgency Close
Usually in the context of the deal turning less attractive if sign-up does not take place this very instance. Bit pants really. 

USP
Unique Sales/Selling Proposition/Point. What distinguishes your offering from others that no-one else can provide?