This term is normally used, when a boy and girl are talking to each other a lot and its obvious that they are going to go out soon. This defination is normally used in the UK.
Taisha: Look Sam! It's Rob's footprint here in the sand!
Sam: Dude, that's like a sign from God or something!
Taisha: I am so fucking linkinized right now.
Sam: Sshh! Let's just glare at this beautiful object for hours until we delinkinize ourselves.
Taisha: Word.