A phenomenon where, in a landscape of office cubicles, a number of people stand up to look around over the tops of the cube walls. Usually an unexpected/loud noise or verbal exchange will cause the curious to rise like prairie dogs out of their holes. The people will scan the cube horizon and soon sit back down.
The white noise system was going nuts and making crazy barking sounds--nobody could get much done because of all the prairie-dogging.
A character in fiction (usually TV or movies) that will meet their demise almost immediately at the beginning of the story. Can also be a real person that is clearly going to fail at the onset. Derived from the original Star Trek TV series in which unimportant characters (wearing red shirts) would accompany the main characters on an adventure and get killed before the first commercial break.
(pointing at TV screen) "See that ditzy chick with the radio? Red-shirt guy!"
"Manfred wants to play darts with them."