Going shopping, and while trying clothes on, realizing how hideously fat you are, yet still buying pants three sizes too small, promising to starve yourself to fit into them before school gets back in.

The day after Thanksgiving, traditionally the first day of the Christmas season and the busiest shopping day of the year. Called "Black Friday" because of the massive profits retailers rake in, recording them in black as opposed to red which denotes losses.

Short for plastics; term used to describe a sterotype of females those who portay any number of the following characteristics; acting like a typical dumb-blone, talking like a cliche cheerleader, worrying about makeup, going shopping on a regular basis, spending time with other girls of such nature, priding themselves on beauty and nothing else, etc.
See the film 'Mean Girls' for a better definition of 'Plastics'

When you are browsing online stores using Apple's OSX, but not buying anything. In contrast to in the real world or when using a PC you (most likely) are window-shopping.

when you let your mom do your shopping or you take mom with you shopping

Act of attending a grocery store to obtain food and other necessary supplies without attending to any basic hygiene such as a shower, deodorant, washing your face or anything else one would normally do prior to going out in public and handling errands.

Removing oneself from one's comfortable, suburban, white lifestyle for the day, by going shopping in one's local hood with a group of friends to take advantage of the ridiculously inexpensive clothing stores. The experience can be augmented by trying on flat brimmed hats, blasting hip hop on the way down, and dining at such hood quality institutions as McDonalds or Pop-eyes.