(noun) condition of scrotum after swimming in cold water, walnut bag, also at point of maximum sexual excitement, also before decisive moment (battle, competition, exams, then adrenalin-induced)
by Alarick September 12, 2006
Get the walnutsack mug.when somebody has a lot of openis and they shrek your ballsack until you have one nut, they walnutsaked you.
by F3se5 June 27, 2018
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