Here is a list of things that I've heard people say and a corresponding list of what they meant to say. If you know any phrases that people often say incorrectly, send me an email and I'll add it to the list!

Things people say	What they meant to say
That's a mute point.	That's a moot point. (If it were mute, it would be slient instead of irrelevant, right? *from delton70*)
Irregardless	Regardless
I need to unthaw this stake	I need to thaw this stake
All-timers	Alzheimer's
Nip it in the butt	Nip it in the bud
Morris code	Morse code
Corn rolls (hair-style)	Corn rows
Pall bear, Ring bear	Pall bearer, Ring bearer
Tie me over	Tide me over
Supposably	Supposedly
"He did a complete 360 on what he said yesterday."	"He did a complete 180 on what he said yesterday."
Butt naked	Buck naked
Acrost	Across
That doesn't jive with me	That doesn't jibe with me
All of the sudden	All of a sudden
Wave of the future	Way of the future
Full proof	Fool proof
Call my LAN line	Call my land line
Alterior motive	Ulterior motive
Chester Drawers	Chest of drawers (There is a store at Disneyland called "Chester Drawers". That's probably where this comes from.)
Much to do about nothing	Much ado about nothing
I contribute my success to...	I attribute my success to... (I have never used this incorrectly as I am not successful)
I could care less	I could'nt care less (If you could care less then it means that you care more than you possibly could)
"Well, that's a whole nother thing!"	"Well, that's another thing entirely. (You can't just stick wholes into anothers at random!)
ATM Machine	ATM. (The added 'machine' is redundant. This applies to many acronyms. For example 'FAT Table' is redundant. You either say 'FAT' or 'File Allocation Table'. Saying 'FAT Table' is not hoopy.)
Cool	Hoopy. (If that didn't make sense to you, perhaps you should find a different website to waste your time on.)