Crud is that stuff that you find caked on to the back of a household oven. It also is popular with little kids for a substitute fof "crap", so they don't get in trouble and have to go to the office.
by That Bum May 4, 2005
Gramma: This will help you cough up all that crud.
Jimmy: I don't think castor oil will help, gramma.
Jimmy: I don't think castor oil will help, gramma.
by Linda Ronstadt February 4, 2010
by Will July 7, 2003
a word used instead of "crap" most people say this if they do not curse so instead they use crud which sounds very similar yet some people who curse say crud anyway. crud can mean poop, sludge, slime, or pretty much anything goopy or sludgy.
aw crud
by phynomonouse January 29, 2009
CRUD: "...an acronym for 'Chalk River Unidentified Deposits.' ...black, highly radioactive substances found on the inside of piping and components at the Chalk River nuclear reactor ... CRUD has now become a standard industry term referring to minute, solid, corrosion products that travel into the reactor core, become highly radioactive, and then flow out of the reactor into other systems in the plant. ... CRUD can settle out in crevices or plate-out on the inside of piping in considerable quantities ... The major components of CRUD are iron, cobalt, chrome, and manganese ... CRUD is a concentrated source of radiation and represents a significant radiological risk because of its insolubility." (United States Federal Energy Regulatory Commission, Testimony of James K. Joosten, September 15, 1997, pg. 13-14)
by Hamishr June 30, 2005
by Ashley Dunlap March 18, 2007
by Dawn October 8, 2002