When you click on the "like" button on your own Facebook status or comment, when nobody else does. Usually when saying something boring, inappropriate or rude. Or just when trying to be funny and suck at it.
John: "I just finished eating my dinner :)" - John likes this
Peter: "brother stop posting shit and masturlikeing it"
or
Susan: "Finally I got my period :D:D" - Susan Likes this
Robert: "You just made half of the boys in school very happy" - 241 people like this