Babaji ki booti 

Simply meaning weed. Here 'Babaji' referred to lord 'shiva' as he's considered as a weed lover. And booti means herb.

So

Babaji ki booti = shiva's herb,
hence weed

Babaji ki booti is also the name of a Bollywood song from the movie 'go goa gone'. Which shows daily routine of 3 soner friends.

I just had babaji ki booti

Babaji ki booti by Sala Kutrya November 15, 2018

Babaji ki booti 

Babaji ki booti means weed. Here 'Babaji' referred to lord 'shiva' as he's considered as a weed lover. And booti means herb.
So

Babaji ki booti = lord shiva's herb, hence weed

There is a Bollywood stoner song with the same name from the movie 'go goa gone'

Just had babaji ki booti

Babaji ki booti by Sala Kutrya November 15, 2018