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a somewhat kind term for someone who has clearly lost their shit. Especially someone who was somewhat crazy to begin with, but has somehow surpassed crazy. this word especially refers to ex's, bosses, housemates, ex-housemates... and ex's.
"i knew she was crazy when we were together, been since the break-up, bitch is effing nutser!"
by kate panda February 17, 2010
Can be used as an adjective a noun or an exclamation. Used for pretty much any situation to discribe anything.
(usally proceeds Ho!)
Example adj- Ho! Dats one nutser

-Dat burger is one nutser!
-Ho! Dat chick is one nutser
-Ho!Jaylens babes is one nutser!

by mauipino June 25, 2009