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3.
Online stores typically have customers construct before they pay a list of all the items they want to buy. This list is called a shopping cart, in analogy to real-life supermarket shopping carts, so the command to add an item to the list is typically "add to cart".

By extension, the phrase can be used to mean "I want it".
Once I found the right brand, I clicked "add to cart".

And they have a machine that can make whatever food they want out of thin air. Add to cart!
by Subsequence May 22, 2011
 
1.
Online stores typically have customers construct before they pay a list of all the items they want to buy. This list is called a shopping cart, in analogy to real-life supermarket shopping carts, so the command to add an item to the list is typically "add to cart".

By extension, the phrase can be used to mean "I want it".
Once I found the right brand, I clicked "add to cart".

And they have a machine that can make whatever food they want out of thin air. Add to cart!
by Subsequence July 10, 2011
 
2.
The act of paying someone.
You owe me $20, you better addtocart.
by sothatshowitsgonnabe June 23, 2010
 
4.
1. an Internet Era phrase used to communicate one's intent of purchasing or engaging in something.

2. colloquialism for yes
When she asked if I wanted to come in at the end of our date all I could think in my mind was, "add to cart."
by the surfer June 27, 2011