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1.
an annoying teenager usually a girl that acts higher than others and has no real priorities. She/he treats others with no repect and is very insecure.
"Hey, I just got it in with a grape nut! And I ain't calling her back!"
by francias January 26, 2011
 
2.
Haemorrhoids;piles
"Christ, my grapenuts feel like they're the size of basketballs"
by Lord Iffy Boatrace February 13, 2003
 
3.
one of the top q3 ra3 players on the eastcoast of USA.
grapenut railed fiji
by Anonymous July 10, 2003