420 friendly....這是什麼意思阿??

如題~
最近常看到這個字，但完全不懂他要表達什麼.......
這是我查到的定義，但我還是有點看不懂
可以用中文解釋給我看嗎??
謝謝^^
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.

See the definition of 420
"420 originated at San Rafael High School, in 1971, among a group of
about a dozen pot-smoking wiseacres who called themselves the Waldos"

"Single white male, 420-friendly..."

"Hey, is this party 420 friendly?"

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