1) (n)/(adj)Someone cares so much they practically kill you with their caring.
2) (n)/(adj)Used in a sarcastic manner when someone is complaining non-stop about something minor.
1) Bob: Ever since I broke my foot Allan has been all fuckin' careinator on me.
Sally: That nigga just don't know when to quit.
2) Kika: Omg and then he was like 'LOLZ' and I put my away message up cause I didn't know what else to say and he was all, "Kika where r u?" and I started crying cause I didn't know what to sa-
Harry: *points to self* CAREINATOR.
3) David: Everytime she starts crying to me I hang up on her.
Steve: Nice job, careinator.