Also have no idea what money laundering is (see Office Space) so again, thinking of this from now on.
From the submitter:
"My sister-in-law wrote this from China: "After a trip to our neighborhood meat market I'm always leery about the change I receive from the vendors... consequently, I typically do some money laundering when I get home... Literally!"
So when she stops, could you say that habit is...
... all washed up?