The process of having your genitalia fondled by low-paid government officials at a major airport in the name of a false public perception of national security. An optional procedure only used if one opts out of using a scanning machine that allows a different, anonymous low-paid government worker in a back room to see your private parts (and possibly also bombs) by way of x-rays that have been shown to increase risks of cancer.
"It's not a grope. It's a Freedom Pat!" - Head of the Department of Homeland Security