When someones availability as a partner is significantly compromised due to the apparent involvement with a somebody else.

Market spoiling is not exclusive to those in relationships.
Guy 1: Ayy you posting your girl on the gram?
Guy 2: Naaah, don't want her to spoil my market.

Spoil my market = (ruin the probability of other females sliding in his DMs)
by badgalmg May 31, 2018
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