It essentially means you have you lost your mind? or it can be used to express your hatred or dislike for a particular activity or person, similar to kms.
"Moe's is better than Chipotle."
"Have you bumped your head?!?"
or

"This traffic makes me want to bump my head."

or
"Help! I have bumped my head and I can't get up!"
by colls42 December 5, 2013
Get the have you bumped your head? mug.
what u say to someone after they say something completly ridiculus or stupid
Lady- Baby, no more going to the strip clubs. its tearing us apart.

Man- did you bump yo head on a cabbage truck?
by micheal watts December 26, 2007
Get the did you bump yo head on a cabbage truck mug.
Threatening to shoot someone in the head like congresswoman Gabrielle Gifford, who got shot

(in the head at close-range) along with a dozen

other people in the tragic Tuscon, Arizona shooting.
Bank Robber: "Put the fucking cash in the bag! Do it now and make it quick, or I'll shoot you in the head like the fucking congresswoman!"
by ribetab January 10, 2011
Get the I'll shoot you in the head like the fucking congresswoman! mug.
Looking you upside your head means to look at you in a crazy manner due to something that's going on crazy around you due to your allowance.
That wench was looking you upside your head like she had a problem with you.
by Brat069 April 25, 2019
Get the looking you upside your head mug.