Top Definition
When someone is obsessed and surrounds their life on one thing, which could be a person, place, or thing.
Melis: The gators are so good!
"What a fanby, she doesn't even like the team.."
by Fanby November 02, 2011
1 more definition
5 Words related to Fanby
A gender-neutral version of Fangirl/Fanboy.
1. They are such a fanby.

2. Ze is a complete fanby. Zer really love their otps.
by Spongbob July 19, 2014

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