The type of drink people order along with extremely fattening food to justify the meal as being 'healthy'
"I would like a Big Mac, large Fries, large chocolate shake, and three chocolate cookies...Oh and a large soda, but make it Diet Soda because I'm trying to watch my weight."
The curious way some people will order a 2000 calorie,grease laden,artery blocking,"obesity-in-a-bag" fast food meals and order a diet soda as if they were really concerned about healthy eating and the soda will magically negate all the fat grams.
Got some flat diet soda? If it contains phosphoric acid and/or citric acid, don't throw it away, put it in a spray bottle and use it as a cleaner. Do NOT use regular (sugary) soda, or you'll make a super sticky mess!