“Imma” has came to be common usage in the last few years, not just verbally, but in writing.

“Imma go to the store” vs “I am going to go to the store.”

Most of the cutesy nicknames do not bother me, sure many of them are dumb, but being so dumb and lazy as to not only saying Imma, but also typing it, and not knowing it is not an actual word, is mind blowing to me.

Then the whole to/too, your/you’re, their/there/they’re drives me nuts when I see it used incorrectly. What really chaps me is reading my writing and seeing that I have used it incorrectly.