A phrase made popular by the 1989 movie 'Heathers' and the 2014 musical of the same name. It is very similar in meaning to 'Are you retarded?'.
Heather Duke: Can I be red?
Heather Chandler: Did you have a brain tumor for breakfast? I'm always red
Heather McNamara: I've been looking forward to this all day!
Heather Duke: Did you have a brain tumor for breakfast?
A grandiose insult only used for the highest of offenses, it means the victim of this unspeakable offense, are a mineral consuming infant with a round physique and the facial appearance of a tumor
"my girlfriend cheated on me the other day..."
"Well she's a salt licking skittle lookin tumor baby!"
Rumors that someone has cancer. Starts out unconfirmed and quickly escalates.
Did you hear the Tumor Mill? Steve Jobs has cancer.
When a man’s cock is so fucking massive that it causes a bulge on the exterior of a females stomach when deep inside, protruding upwards creating the image of a bump and tumor
“Girl, last night.. I was watching him fuck me raw and that cock tumor, my stomach was bulging from his massive cock”
when you say a brainrot phrase out of the blue.
Guy 1: Hi!
Guy 2: Hi skibidi sigma!
Guy 1: …
Guy 2: Sorry. I had a brainrot tumor.
A calcified mass in a person's intracranial space that is created from when a person jizzed a fuckton of fluids at the end of a blowjob.
Did you hear that Stacy is in the hospital? I heard that she got a flood tumor.
Somebody who is being annoying or acting like a Bi**h
Yo did you hear that kid on Fortnite the other day? He was acting like such a tumor.