sell down

Etymology 1
sell + down

Verb

 * 1)  To become less by being sold.
 * Don't order any potato cakes for 3 days while what we have sells down.
 * 1)  To reduce by selling.
 * Don't order any potato cakes for 3 days while we sell down our stocks., or
 * Don't order any potato cakes for 3 days while we sell our stocks down.

Etymology 2
Shortening of sell down the river

Verb

 * 1)  To betray a person; to conspire against someone for personal gain.