Fell and bumped your head

Meaning you must be seriously crazy. That you or someone else is experencing a really dumb moment at that time.

After Jimmy made the dumbest comment I ever heard I said fool you done "fell and bumped your head"

flower out of your head

first spoken by a law professor from pace university in New York. From 1989. In referencing when a student spoke an articulate thought or shared an original idea, or one in which a student had an “ah-ha “ moment the professor would yell out “flower out of your head “

“professor, I disagree because based upon XYZ the answer should be…. Professor says “flower out of your head, You are absolutely correct, well done.”

get your head tight

To get high, esp. by using marijuana (cannabis).

Also: to get one's head right.

Syn. Take care of head (q.v.)

I'm going to sit out on the patio and chill, but first, I gotta get my head tight.

You just had a long day of work, homie. Before you bother with any other bullshit, I just rolled a blunt, and I'm going to get your head tight.

cut your head off

An insult used in New Zealand and Austraila. Apparently telling one to cut one's head off is a bigger shot to the balls than calling one a bugger.

American: Might as well cut your head off
Aussi: What did you just say ta me?
*Ameircan has his arse handed to him.*

born with rocks in your head

to be clearly delusional, usually with regard to the a person's physical appearance.

"I think she is so hot.."
"Umm clearly you were born with rocks in your head!"

give your head a shake

A phrase which has never actually been spoken aloud. Instead, it is found exclusively in letters to the editor and on message-boards. Must be spoken with a grumpy old white man accent.

Legalize marijuana? You need to give your head a shake, boy. And get off my lawn.

shut your head hole

similar to shutup
shut your face, and
shut your noise tube

"shut your head hole Britney Spears!!!!!1 one oh oneone eleven!!!!!."