A combination of the phrases "for real" and "seriously". The two are combined to form "for-serious", adapted later to "ferserious" meaning "really serious." Most commonly used in question form.
"When I first heard that Anna and Billy were going steady, I didn't think it was ferserious, so I asked outloud 'Are you ferserious?!?'"
by Niki Williams August 16, 2003
by Danielle August 23, 2004
a combination of "for reals." and "seriously"used to show emphasis. used in either question form or to add seriousness to a statement.
by dominizzle December 02, 2007