The art of creatively killing somebody with a sniper rifle (usually the intervention) in Modern Warfare 2 by using several methods such as equipment canceling, silent-shotting, weapon switches, etc.
They are usually made into episodes and montages, which are a collection of their clips usually recorded with a Hauppauge HD PVR, and edited with Twixtor, a slow-motion plug-in for many editing softwares.
Famous Trickshotting clans include: FaZe, Dare, dZ, TSU, and many more :)
"Oh My God did you see FaZe Ramos's new trickshotting episode?"
"Holy Shit, did you see the trickshotting Frosty did on highrise off the crane!"