The random item one buys when purchasing an embarassing item, such as condoms or gas reliever in order to offset the awkwardness one feels toward the cashier.
When buying a pack of gum so you don't walk up to the register only holding gas-x, the gum is your item of shame
What happens in any Mario Kartgame when you get hit with a bunch of red and green shells, obstacles, and blue shells at the same time bringing you from 1st to 8th/12th. Brings the anger out of you instantly.
Guy: Yes! I'm gonna win the r-*crash by red shell*, *crash by green shell*, *blue shell explosion*, *falls off cliff*