The mental status of an individual after a long night of indulging in copious amounts of alcoholic beverages, usually but not limited to Vegas bombs or an unhealthy count of bush light. Said individual is not able to respond to questions in proper English or make any decisions other than hydrating and sleeping.
"Hey do you want to get some breakfast?"
"uhh duhh."
"What's wrong have you gotten mush brain?"
The point between childhood & adulthood where the brain turns to mush while morphing into intellectualness.
I think my kid is suffering from TBM (Teenage Brain Mush). Why else would he/she be so irrational?