<human>: Can you summarize the given text in a few sentences?

This happened today whilst driving in the car with the hubby. 

Backstory: we have been together for 7years and are very comfortable with each other and each other's flaws.  We like to joke around about silly things,  so whenever I use large words and phrases,  my man (let's call him Dustin cause that's his name) always has this blank look on his face. I usually have to ask him if he understood what I've just said, to which he responds with some far-fetched answer that is completely wrong. We have a running joke where all of these words get put into "Dustin's Book of Big Words." I will admit I'm quite smug about the whole thing because he is the same way about math with me (I am horrible at mental math/percentages,  so tipping and adding bills I always a nightmare for me,  and entertainment for him). 

So Dustin drives a right hand drive car,  and is part of our local Subaru club, etc.  etc. all that car garbage. While on our way to my sisters, I spot a very silly looking hatchback with the littlest little hood scoop and immediately exclaim "HAHAHHA did you see that hoop scud?!" 

As the words came out of my mouth I questioned my pronunciation, believed I was fine,  then looked at Dustin's confused face staring back at me and realized my mistake. This all happened in a split second,  and on top of that I forgot what a hood scoop was called. 

So I'm sitting there thinking what I said sounds funny while trying to articulate what I mean,  while Dustin is pissing himself laughing because my English no good. And now our whole relationship's dynamic has changed,  as I am no longer the well spoken,  eloquent,  and vocabularily enlightened individual I once was in his eyes.
<bot>: I poke fun of my man light heartedly because he doesn't understand big words, fuck up by forgetting how to pronounce "hood scoop," and instead say "hoop scud" and have now lost English skill points. /fail