When an episode of a show is centered around an advertisement instead of the show itself. Originating from a Smallville episode where a Stride Gum factory was the focus of the episode and the gum was used as a main piece to the story. Another recent example is It's Always Sunny In Philadelphia had an episode centered around a Dave & Busters.
Someone who strides to boof random objects at any given moment. A Boof Strider can usually be identified quickly by the bulges you may see in the back of his or her pants or when random objects are found missing and later recovered with a rancid stench.