Literally "Search The Fucking Forums"; a term showing the frustration of being bothered with questions that the asker could have quickly figured out the answer on their own with minimal effort, usually by searching the forums.
<forumnoob> how do I uninstall this program?
<@forumnoobsmakebabyjeebuscry> search the fucking forums.
<@forumnoobsmakebabyjeebuscry> that question has been asked and answered about a hundred times
<forumnoob> you could just tell me