Slang; when you meet someone new and aren't
convinced by the front they're
putting on, so you do some digging into their
background to try and find dirt on them.
Alice: Hey Bob, what did you think of our date
yesterday?
Bob: It was fine. But I Googled
your name when I got home and found a mugshot of you. Why did you rob a bank?
Alice: Wtf, quit butt
sniffing!