Spinal Tap-ian adjective1 •(informal, humorous) Of, pertaining to, or resembling the fictitious rock band Spinal Tap, especially with respect to its excessive behavior, its very high turnover of members, or its use of sound amplifiers with a maximum setting of 11 (instead of the usual 10).Without fail, each movie registered a 9 or 10. Only the movie Sky High deviated from this range, coming in at a SpinalTapian 11. — 2007
