I see these examples all the time, as people write a lot online, like on this site and Facebook. I also did not know about 'Shoo In'... It's kind of fun to see the origins of some of these sayings.
I'm really grateful for the red zig-zaggy line that appears under a misspelled word, so I have a chance to try again before posting and embarrassing myself! LOL.
NZ, auto-correct drives me crazy. It is especially bad on my phone.
Tothill, I thought "fur sure" was originated by California surfer dudes!