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Eating virtually nothing but Ramen Noodles, as would a low-income college guitarist saving up for a guitar/amp/gear.
Dude: Dude, you can't afford that effects pedal!
Guitarist: Hey, it's no problem, I'm cool with the guitar diet.
by Fat Tony Giovanni April 19, 2007
Eating off the 99ct tacobell menue and living in the back of a Van playing at small venues.

The guitar diet consists of:
99ct Tacobell , Mcdonalds , Wendys and Ramen Noodles red bull and cocain.

FOB , PATD , MCR , ect and other bands are on this famous diet. The guitar diet
by K.Dahl August 13, 2007