This is kind of ridiculous. It is lunar New Year's, during which the standard greeting is 새 해 복 많이 받으세요! Have many blessings for the new year! One of my friends changed it a bit...

새해 박 많이 받으세요! 

Instead of wishing fortune, you are wishing 박 (fucks). As a foreigner, if you say this people will probably just think you have an accent. Too bad. I thought it was kind of cute.