Metabolism Definition

Is eating less fat than recommended healthy?
I am 19 and trying to work on improving muscle definition and was wondering: If I simply cut out most fat from my diet and focus on getting those calories from somewhere else, will it damage my body or my metabolism in any way? I want to lose fat as efficiently as possible, without hurting my body.
no everybody needs a little fat, but if you eat a little less than reccomended i think thats perfectly alright
Barbell Swing for Abs and Core DEFINITION

Metabolism Masterclass