The action of saying or writing whatever comes to mind at any given time to confuse the other person,to get there attention or just to piss them off. When somebody is randomizing they will finish up by saying exactly or I know.
John: So how is the family?
Carl: You know it could happen
John: What are you talking about?
Carl: I know
Carl was randomizing John to piss him off and confuse him.
When someone writes,says or does whatever comes to mind at any given time to confuse the other person,to get there attention,to do "icebreaking" in any situation or just to piss them off. It could be used as a noun or verb(the action usually being randomizing).
I'm so bored I'll just randomize some friends by texting them incomplete phrases.