I saw this recently:
It’s coming next–where you lead off.
First of all, if someone is leading, it’s LED off. But I think she means LEFT OFF.
For all intensive purposes.
Should be intents and purposes.
It’s a doggy dog world.
Ahem. Do you mean dog eat dog world?
Irregardless of the real issue, you are an asshat.
Irregardless isn’t a word. Regardless is.
The library is your friend, people.