This document defines and provides examples for several vocabulary words that are often used in funny videos: 1) The word "hilarious" is defined as extremely funny and causing a lot of laughter, and is used to describe a hilarious video about babies. 2) The phrase "fall flat on one's face" is explained as falling on one's chest on the ground, and is used in an example about a baby slipping. 3) "Mayday" is a special radio signal for help from a ship or aircraft, and is used in an example call for help. 4) "Misapprehension" means a failure to understand or having an incorrect belief, and is used in an example