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 15, 2005
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Phrase uttered when in a overwhelming state of confusion, mostly by dogs.
Erf? Uh, I should've studied for this test.
by droneaccount808 November 17, 2010
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erf is a word to describe a state of confusion. =
wah da erffff is that what you call your face ??
by Kevin Cheung July 19, 2005
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Verb; To perform a very dirty deed, usually in sexual, slutty nature.
"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."
by Bruuuce October 19, 2007
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Erf is the word that people use on runescape to say "fuck you" as it is blocked.
Below is a graphical representation of erf.
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........../'/.../..../... ..../¨¯\
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Erf off you erfed-up n00b!!!
by PerfectPudding December 6, 2007
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noun. (erf)
1. A nonchalant noise often made by wired kids; 2. A building block in the formation of Queasy Erf Moneybags Bay Bay 4th gen. Bay; 3. E.R.F. - Every Redneck Farts; 4. Absolutely nothing
1. erf, erf...
by Queasy April 27, 2012
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A day of celebration set aside each year to remember Sir James, a general in the Purple Army.
We gonna' party like it's your ERF DAY!
by Paradox2767 April 23, 2011
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