It's when you are so bored that you scan your tits, convert it to a jpeg and then post it on newsgroups---preferably usenet.
Slutty Girl-1: Oh man, I am so freaking bored.
Slutty Girl-2: Ya I know. Either we should blow a random stranger or 'scan our tits.'
by Jeff September 12, 2003
Get the Scan your tits mug.