Top Definition
A person who says their diet starts tomorrow so they can eat whatever they want and not feel bad. Or a person who procrastinates their diet.
Mike:I made this awesome cake! Too bad you can't have any because you said you started your diet yesterday. Kelly:It's alright, I'm starting my diet tomorrow. So give me all the cake! Mike:Your such a Dietcastinater
#mike #kelly #cake #diet #yesterday #tomorrow #sigh #awesome
by I11egal Ninja October 12, 2010
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