Word used to express disappointed yet accepted state of undesired feeling, situation or physical state. A vocal statement of realization - that things are f-ed up and you can't change it. "That's erf'ed up."
You just woke up from a gigantic night of partying... realize head is pounding and stomach about to hurl. Instead of groaning, which could mean anything, you mutter "ERF!!" and those laying around the room also waking with hangovers acknowledge your state and also chime in with an affirmative, "ERF!".
by BleenieTheCat October 17, 2005

by droneaccount808 November 20, 2010

by Kevin Cheung August 09, 2005

"Yo did you hear what happened the other night?"
"Yeah, I can't believe Suzy ERFed that dude in the back of her Dad's Camry."
"Yeah, I can't believe Suzy ERFed that dude in the back of her Dad's Camry."
by Bruuuce November 05, 2007

Erf is the word that people use on runescape to say "fuck you" as it is blocked.
Below is a graphical representation of erf.
......................... /´¯/)
......................,/¯ ..//
...................../... ./ /
............./´¯/'...'/´¯ ¯`·¸
........../'/.../..../... ..../¨¯\
........('(...´(..´...... ,~/'...')
.........\............... ..\/..../
..........''...\......... . _.·´
............\............ ..(
..............\.......... ...\
Below is a graphical representation of erf.
......................... /´¯/)
......................,/¯ ..//
...................../... ./ /
............./´¯/'...'/´¯ ¯`·¸
........../'/.../..../... ..../¨¯\
........('(...´(..´...... ,~/'...')
.........\............... ..\/..../
..........''...\......... . _.·´
............\............ ..(
..............\.......... ...\
by PerfectPudding January 01, 2008

by Paradox2767 May 14, 2011
