A classic old person who is unwilling to accept new ideas and believes that they are always right when they are 100% wrong. They have no evidence to back up their "facts" but and their only defense is "I know I'm right". They also rely heavily on answers.com for information and smell terrible.
2+2 is 5?! What are you, Gammy?
by BaxterHerman May 4, 2021
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Means disgusting, gross, manky etc.

It's one of them words you start saying as a joke but then can't stop saying, like "bro" and "same" and stuff
by Xjxicixhhdjxjs April 14, 2019
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Gammy: something disgusting, or just plain nasty.
Jeremy: Her breath stinks of tuna salad
Sam: Now that is just gammy
by Yournan@grannyporn.com May 23, 2017
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