The word Yah Gilly originates from when Ethan Snuck in a fish from petsmart and named it Gilly Nelson and Mckinley said Yah Gilly.
Yah gilly means anything that fits good vibes or good job
I made a 100 on my chemistry final. YAH GILLY
A funny thing your mom likes up her rectal cavity
Me: you mom loved my YA YA YEE YAH!!!
Friend: stop talking about the funny thing my mom likes up her rectal cavity.
Something Your Weird Friend says to you when u try to say FY to them but they change it to Fanks Yah
You: FY!
Them: fy means Fanks yah
A cool new phrase with the kids in New York.
ME: Hows it goin bro..
Him: Not bad bro..
ME: Yah yah nah turd
An excited expression for being in the zone of a hyped moment
I found a bag of uncut diamonds on the moon beneath Emma Stone.
Yah yer!