This is the 13233rd most frequent Polish word.
opchnąć
To sell or get rid of something, often quickly or informally.
Opchnąć is used here informally to mean 'sell' or 'get rid of'.
On opchnął starą kanapę w komisie.
He sold the old couch at a thrift store.
Opchnąć in this context reflects an informal effort to monetize items quickly.
Spróbowała opchnąć niespodziewanie odziedziczone rzeczy w internecie.
She tried to sell the unexpectedly inherited items online.
Opchnąć implies casually disposing of an item for monetary gain.