Top Definition
to message a foodie-friend a description or photograph of a particularly sumptuous meal with the purpose of:

A. wooing them to dine with you.
B. divulging delexplicious gastronomical details when mailing leftovers is impractical.
C. simple braggery.
"My mom really wants me to come home for Thanksgiving this year: she's been gastrosexting me about how moist her turkey is all day."
by BlueJean July 07, 2012

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