"Bro, you cant go after her, she only broke up with Steve last week, she's still radioactive."
Definition 2: A kind of girl that you date and you know what shes not good for you but you can't really leave her shes just that good
Definition 3: The opening song on the 1978 Gene Simmons Solo Album
X: Hey you want to date Imelda
Pancho: hell ya I want to date her
X: Well just to let you know that chick is Radioactive man to start talking to her man!
Matthew X: Hey man you gotta leave that chick man
X: I want to but shes Radioactive man, she knows how I feel and she knows that this is real man!
Matthew X: She wants it all the time?
X: Yeah how do you know
Matthew X: I was listening to KISS Gold and I heard it man lol