A portmanteau of "promise" and "mosh"
'Pro-mah-shing'

Listing something desirable on an online local selling platform (Such as Marketplace or Craigslist) at an obviously undervalued price with the sole intention of trying to get multiple people to rush to the seller, and hoping the desperate buyers will get into a physical altercation to buy the product, for the seller's own entertainment.
Kyle: "Bro!! Someone just listed a MINT well maintained 1991 Honda CR-X on Marketplace for $2K! There's no way this is real."

Sam: "It might be real, but it sounds like the seller is promoshing. If we get there in the next 30 minutes, it might still be there, but you will likely have to fist fight several people for the chance to buy it."
by Jcloveturbo88 August 17, 2023
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