When in a mosh pit of such viciousness that you are pushed and pulled in all directions and manners. Your personal space/ability to stand freely is violated to such a degree that you have no choice but to leave the mosh pit or suffer the consequences - e.g. lose a shoe/eye or get trampled on.
This usually occurs when surrounded by those who have no mosh pit etiquette or are in a mosh pit for the first time coupled with their first drinking experience.
The feeling of violation stays with you long after the experience.
Noun. A piece of music consisting of disparate elements, a number of which have been appropriated from other recordings in much the same way as a mashup. In contrast to a mashup, a key element of a mashupera is its link to opera music. The use of the word "opera" denotes that the piece either features samples of opera music or is longer in length than a mashup ("opera" therefore functions in the same way as in the term "rock opera" to suggest the epic and theatrical nature of the piece).
"Treetops McPhoenix has released 'Oedipus Rex: A Tragicomic Mashupera in Ten Parts', which samples Stravinsky's opera-oratoria and combines a dizzying array of genres."