Autocorrect on the iPhone can be quite useful. If you write something that isn't a word it'll change it to another word that you've used before.
Or anyways, that's how it's supposed to work.
I am fairly certain that I have never used the following words, yet somehow my autocorrect knows them and thinks that I want to use them when talking to my friends:
These are either names or words whose meanings I don't know. If I ever wrote them it was a typo, and only once. Oh, and my iPhone also thinks that I might want a misspelled word autocorrected to "stab era" or "pro ledges". Yep, it's autocorrected a single word to both of those things.
And then it sometimes likes to change words that are spelled correctly. Such as changing "of" to "I'd". What the heck??
Oh, and for a couple days it was turning "brb" into "Ben". That was fun to explain to my boyfriend! "Sorry, if I call you Ben I actually mean brb..."
As useful as autocorrect can be, it can also be rather weird. And entertaining at times. I confess that my guilty pleasure is reading bad autocorrect fails online. :)