gahg - the silly laugh you make when someone says something stupid

the silly laugh you make when someone says something stupid enough to make your brain shut down

My friend said he turned into a chicken. I did a gahg so loud the dog ran away.

When my teacher said pizza is a fruit, I did a gahg in the middle of class.

I saw a guy wearing socks with sandals and did a gahg so hard my phone fell out of my hand.