Used when a family member (usually a parent, grandparent, aunt, uncle, or some other older generation family member) posts something online, usually on Facebook or other social network, that pertains to you in an embarrassing or disapproving manner.
Posts are almost always linked to you or on a thread in response to something you posted. Famtroll posts usually consist of an embarrassing picture of you as a baby and referring to you as "My little boy/girl", disapproving responses to your posts, or telling how much they "Wuv you shooo much my little (childhood pat-name)!" on your profile page.
This usually stems from older generations' inability to understand how the internet works on a social and human interaction level, as well as your stupidity to have your mother/father/grandparent as your friend on Facebook.
Steve (via Facebook status update): OH SH*T! I finally hooked up with that INSANELY hot MILF from the bar last night! WIN!
Steve's Mom (via facebook): Uhhh... we have to talk about this. You shouldnt be posting stuff like this on the internet. And what did I say about posting swear words! Luv U, xoxoxoxoxox -Mom
Steve (via Facebook): OMG Mom, WTF?! Are you kidding me right now?!
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi