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!
1:a word used 2 describe an individual who is so hot u'd rape them. 2: or just an awesome thing ingeneral aka the new cool. 3. the new inside jokebetween friends.
1: dude did u see that girl? shes rapetastic
2: man i'm telling u i was balling yesterday i made so many rapetastic shots.
3: ha ha man u said whose rapetastic? shit u must be high.