Top definition
When someone or something has the characteristic of being Radical, Fantastic, and Delicious at the same time. It is to show how extremely awesome, cool, or pleasing someone or something is. This word can be used in a sexual way.
Regular Use

Person #1: Brooo, did you see that Lil Uzi Vert concert yesterday?
Person #2: Yeah man! That concert was Radatasticlicious on my momma!

Sexual Use

Person #1: Damnnnn gurl! You lookin Radatasticlicious! Can I tap that?
Person #2: Sure boy! You can tap it any time any day!
by Consepseon Mitchell March 17, 2018
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