Is the act of denying an opponent's pass, shot or cross during competitive play by means of solid blocking.
Is most notably and skilfully executed by UNSW women's football players.
"Look at how bad Apia are at Gandalfing"
How did your date go?
It was great, but she totally Gandolfed me at the end. I think I saw her delete me out of her phone after i tried to give her a good night screw.
B: "You're about to do what?!"
A: "Gandalfing. I'm about to go titty-fuck a girl, cum on her chin, and give her a beard... like Gandalf!"
B: "Dude, nice!"