by Crotch Club December 30, 2007

A Gandalf High-five is an awesome type of high-five which is reserved to only those who have met Sir Ian Mckellen.
by corbane December 8, 2010

by Gamer631267432 November 5, 2017

A guy who is a GRADE A SIMP. He simps woman all the time, until then he can't get a woman. He is also known to jerk off to fortnite characters and Traps on the internet. Is a good Discord boyfriend (or a girlfriend ;)
by Some really cool guy - D February 18, 2020

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"
One is to respond with - "that is bullshit. You are gandalfing"
by ThunderFox69 December 17, 2017

by Female jacculant sex bot October 12, 2020

A male UNIX or Network Administrator wearing sandals and sporting a long silvery-grey beard. May be bald, or also have long silvery-grey hair. The length of beard is directly proportional to their Gandalfness.
"Hey, check out that gandalf!" - "Oh him, yeah... he's been to every USENIX conference since Kernighan first presented."
by iambeezly February 1, 2018
