420 friendly -> δεν με ενοχλεί το κάπνισμα μαριχουάνας
This is a way to express the acceptance of smoking pot or accepting somone who does so, without overtly mentioning pot or marijuana.
You may find the phrase 420-friendly often in personal ads, especially on Craig's List.
It refers to the term 420 which has become lingo smoking pot.https://www.urbandictionary.com/define.php?term=420%20friendly
he school is often cited as the origin (1971) of the time and codeword 420 in cannabis culture; originally "420" served as a code word for "The Waldos", a group of marijuana users who would meet in front of a statue of Louis Pasteur at 4:20 p.m. to smoke marijuana, both near the statue and at other clandestine locations on campus grounds. The "420" moniker was in widespread use on campus during the '74 through '76 timeframe by the school stoner community. As the usage spread, the original connotations of the word "420" faded away.https://en.wikipedia.org/wiki/San_Rafael_High_School