Gagging It
Getting so shocked or amazed by someone or something that your brain short-circuits and you can't think straight.
When my drag queen friend did a 10-minute monologue in a wig made of glitter, I was gagging it.
My boyfriend proposed during a drag show, and I was so stunned I forgot how to breathe.
When my crush walked in wearing a dress made of pizza boxes, I was literally gagging it.