An as of yet undiscovered genre in the pornographic industry. Studios will actively deploy and follow weather balloons to exclusively film in the heart of raging thunder storms.
When an electric guitar or two electric guitars such as in the case of Lynard Skynard have distortion turned on and are playing the same note, normally the 3rd or 5th note of the scale at the exact same time but at different octives. This of course causes a goose bumpy sensation.
An example is in the chorus of more than a feeling. Boston uses alot of thunder chords. Also in Boys Are Back In Town, the repetitive guitar lick is a grouping of thundercords.
The act of two guys engaging in a masturbatory battle, inside a dome-shaped jungle gym, where the winner is the combatant who can climax first. (Note: During the battle, the jungle gym should be covered by the wagering spectators to prevent any random onlookers from seeing inside.)
Term references the film Mad Max Beyond Thunderdome's arena where opponents battle each other to the death.
"Make sure there's no kids around! Bob and Bill are going beyond thunderbone! Two men enter, one man leaves!"