gachiGASM
You use it when you're so happy you can't even talk. It's the ultimate flex. Newfags don't get it. They just sit there confused.
I did a gachiGASM when I saw a noob get jebaited.
Billy did a gachimuchi and I flexed a gachiGASM.
I was eating pizza and I saw a gachiGASM and I dropped my pizza.