When your head swells from drinking paper-bagged gas station liquor and it inflates like a balloon, while the rest of your body sheds all of its remaining muscle and you look like a stick figure otherwise. Bag head syndrome is PERMANENT, even when you stop drinking and your head shrinks back to normal, you still have a bunch of loose skin hanging from your noodle because it's permanently stretched out. You can visit a bag head removal specialist, but it's really expensive and no health insurance plan will cover the cost. You can also try mewing.
Allen Iverson's head so fat because of bag head syndrome, from all that liquor he be drinking.
by Obama Phone April 28, 2023
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when they have a fat dope sack, an think they are a baller, till the sack is alll gone!
as soon as he traded his car for all that dope, HE GOT BIG HEAD SYNDROME an he started barkin orders at people, when its all gone, he will be askin for a handout from me, again
by D4RK5IDE February 17, 2011
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When you can't remember anything recent from the last 2 hours, and not aware about important events. This is caused from some severe brain injury.
Girl: I can't believe you cheated on me with a hoe.

Guy: Oh my gosh, how do you remember that?!

Girl: Jeez! It's not like i have Post Head Trauma Syndrome!!
by rossano January 18, 2008
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