A word used to describe something utterly disgusting, but with a comedic twist. It makes you gag, but it's fantastic. It's gagtastic.
Adam: Hey, you know that girl from the triple date last night?

Austin: Yea, she was sexy

Adam: Dude, she's got encopresis...

Austin: Wow...that's gagtastic
by Gotadime March 03, 2010
an event or person who is found to cause sickness or revulsion.
the show wasn't that great, in fact the naked old people were particularly gagtastic.
by akacanadianbacon August 10, 2008
A word to describe eating something that tastes completely horrible just because it is good for you.
Gwen: What are you drinking?
Steph: A beet, spinach, and spirulina smoothie. It is completely gagtastic but I am going to look hot in my bikini this summer.

I find greek yogurt to be completely gagtastic, but there's so much protein in it I keep choking it down every day.
by wino624 June 14, 2011

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