To have sex on or around the Thanksgiving holiday. "Turkey neck that cavity" referring to the penis-like appearance of the turkey neck, being stuffed into the turkeys body cavity—resembling a wide-open vagina. (See also: "Stuff her with your giblets")
"Spread out Autumnal-themed tablecloth and get your ass on the dining table; I'm gonna stuff you w/ my giblets and t. neck that cavity!"
by tim_finnegan November 13, 2019
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