If during oral sex you ejaculate into you partner's mouth and they spit the cum onto your chin.
I totally gave him the Cumming of Gandalf the White! That's what he gets for cumming in my mouth!
6π 3π
A Gandalf High-five is an awesome type of high-five which is reserved to only those who have met Sir Ian Mckellen.
Jason: eeeeeeh, I met Ian Mckellen.
Michael: Gandalf High-five!!!!!
*HIGH FIVE takes place*
5π 3π
Another word for smoking marijuana.
I'm gonna hang out with Gandalf
And Gandalf the White, and Monty Python and the Holy Grails Black Knight and Benito Mussolini and the Azure Meanie and Cowbuy Curtis and Jambi the Genie, Robocop, The Terminator, Captain Kirk and Darth Vader, Lo Pan, Superman, Every Single Power Ranger, Bill S. Preston and Theodore Logan, Spock, The Rock, Doc Ock and Hulk Hogan
Where a man lie's flat on his back while a woman gets another woman by the head and forces her head on to the guy's dick.
Hey ladies, you up for a gandalf's staff?
The art of talking out of your arse and lying about every single thing. It is also the art of heavily breathing down a microphone regardless of how many times someone asks you to stop.
Someone says - "My grandad blew away in a tent"
One is to respond with - "that is bullshit. You are gandalfing"