This is when plans are made to do something or a way of doing things has been established, but then some know it all assfuck has to chime in with his/her bright idea. The consequences and repercussions of said assfuck throwing a monkey wrench into the clockworks is what ruins everything that has been running smoothly otherwise. This then causes confusion much like if a applecart would spill out and apples would roll all over the place in a crowded market.
Tony : Why is skippy trying to change the trip plans at the last minute, they were set in stone months ago?
Where you shave a girl's snatch so she'll think you're gonna munch on it… only to find out that she's flipped on her stomach, put in the full nelson and ass fucked like Elisabeth Shue in Leaving Las Vegas.