• to be incredibly stupid. Stems from the phrase, 'sharp as a tack' Obviously, then, marbles are spherical, indicating a lack of sharpness.

  He's sharp as a marble.

  by Bob L., St Paul, MN, USA, Apr 22 2002.

• a person who is being an idiot or a stupid ass.

  Your such a shit fucker.

  by phelps, MA, USA, Nov 29 1999.

noun

• A girl so ugly she looks like she got hit with a shovel.

  She looked good from behind, but when she turned around, she was a shovel face.

  by Xx G., Belleville, NJ, USA, Oct 24 2003.

• Ugly or promiscuous girl. synonym: skank, slut, hoochie, ho.

  That chick we saw on lake street was a straight up skag.

  by Piezo C., Minneapolis, MN, USA, May 20 2002.

• heroin.

  by Javier, Santiago del Teide, Spain, Oct 02 2003.

• a person who is unkempt or unkind

  You're being a real skag.

  She's a skag.

  by Judith D., Oct 19 2008.

• a gross and disgusting girl who is usually very ugly, grungy, or slutty, also known as a dirty.

  What fuckin skeezy ho!!

  by Jeremy B., WI, USA, Feb 18 2000.

• Someone that is slow, stupid and easy to push around.

  by David H., Markham, ON, Canada, May 12 2003.

• disliked, hated among many, ugly, bitchy, snotty, slutty

  You're fuckin' slub

  by Tricia, USA, Jun 16 2002.

• Someone who doesn't know what they're talking about. Out of touch with reality.

  You must be smokin' crack.

  by Karen, Seattle, WA, USA, Jun 29 1998.

• An insult, implying that someone's mental deficiencies or misconceptions are a result from being high on crack.

  What, I didn't hear what you said... I was probably smoking crack. or Throw away my baseball cards?? Are you smoking crack??

  by Emily M., UC Berkeley, Berkeley, CA, USA, Feb 29 2000.

• A derogatory term, implies an unpleasant individual or a low-life. Snaf is an acronym for sub-normal and fucking stupid. Used extensively in the middle of England.

  Look over there, another snaf just walked in.

  by Louise D., Derby, Derby, UK, Oct 23 1999.

• Special Ed, or unpopular.

  Oh my god, that kid is such a sped!

  by Elisa, IL, USA, Nov 14 1999.

• Noun- used to describe someone who is doing stupid or foolish things; retarded. Orgin: comes from SPecial EDucation= SPED. also used in context with a "Sped bus" which is a bus that is half as long as a normal yellow bus.

  Don't be such a sped.

  by Pete F., Easthampton, MA, USA, Jan 04 2002.

• unintelligent.

  by Briana T., Atlanta, GA, USA, Jan 20 2002.

• Stupid, unintelligent. From "SPecial EDucation."

  Of course not, sped!

  by Matthew B., Charleston, WV, USA, Feb 12 2002.

• Special Education, Retard.

  Look at that retard, she is such a sped.

  by Melanie G., Millersville, MD, USA, Jun 19 2002.

• A mentally retarded person. From "SPecial EDucation."

  Look, that sped's drooling on himself again.

  by Matthew B., Charleston, WV, USA, Aug 18 2002.

noun

• a stupid person

  That girls such a sped!

  by Jackie, Hamilton, NJ, USA, Oct 03 2005.

• acronym for "shut the fuck up". Used mainly in computer-based conversation (instant messaging, email, text messaging, etc.)

  by Chris C., Apr 01 2003.