I got bullied at school for being nerdy and seeming bookish (no pun intended), so I still feel self-conscious of sounding like a smart-ass by using longer or more complicated words. Fortunately I usually balance it out by immediately tripping up over my words or making a typo.
(Mentioning being bullied isn& #39;t for sympathy I& #39;m not telling a sob story here, I just had to provide context!)
Also it wasn& #39;t a humble-brag about being intelligent. The irony was I wasn& #39;t actually all that bright at school. I was completely average (still am). I was just geeky and had all the other features of being a nerd.
As a result I sometimes feel the opposite in other situations. I& #39;m actually a clattering dumbass and I worry too much that I come across that way when talking to actual smart people.