Top definition
A pistachio nut that is difficult or nearly impossible to open with just fingers. The opening in the shell is usually present (as opposed to completely closed), thus giving the eater "hope" that the insides can be obtained through normal means.
After watching his 7 year old repeatedly try to break open the nut, the man explained that it would take a few years before his son would have the means to crack the frustrachio.
by shambor fosi November 19, 2012
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