An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function; a neoplasm.
<b>Doctor:</b> Well, Rudolph, we finally figured out what makes your nose red.
<b>Rudolph the Red-nosed Raindeer:</b> Is it pixie dust? Or leprechaun tails?
<b>Doctor:</b> No, it's a tumor.
<b>Rudolph:</b> You mean like a magical Christmas tumor?
<b>Doctor:</b> No, a malignant tumor... The base of which is lodged deep within your brain.
<b>Rudolph:</b> Oh. ... like a happy special-
<b>Doctor:</b> You're going to die!!
by Rian April 25, 2005
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a group of cancerous cells that forms naturally in the body, like steroids
Tumors are not caused by carcinogens
by PlayDohMan May 10, 2004
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"It's not a TOOMAH (tumor) " - Arnold Swartzenager in 'Kindergarten Cop'
by Rangiora August 14, 2010
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1.) An unbelievably annoying person that is so hard to be around. No one can stand this person for more than 30 seconds.

2.)A swelling of a part of the body, generally without inflammation, caused by an abnormal growth of tissue, whether benign or malignant.
1.) "Man, Sean is being a total tumor right now."

2.)"Turns out Sean actually had a tumor, he's in the hospital now."
by Quinnlandmine November 19, 2017
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a cigarette, use it often by big smokers
"Let´s have a tumor!"
"Hey, Give me another tumor!
Camel or Benson? "
by Luis E. July 29, 2006
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A euphamism for one's testical(s), used by immature boys to make an unsuspecting victim look at it / them.
Hey, man, check out my tumor!
by Kisil February 19, 2005
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