it means someone is sending 'stuff' somewhere under false intentions. like sending a 300 dollar 'Coach' bag to someone in another country and declaring on the customs form it is a gift (so it is not taxed or charged duty) but actually is done to cheat on taxes. Some countries are NOT allowed to recieve certain things. Like Cuba is not supposed to get US goods. So if someone asks you to send a banned item to ( let's say the UK) and they forward it to Cuba, you have (unwittingly) contributed to breaking the law.