What grammatical errors really piss you off?

[Chaos_ult]

supposibly is one that my friends use constantly..ugh

I've also noticed that for some reason people replace "fiend" with "feen"

People are dumb.

[tom10167]

When people talk it usually pisses me off.

[chuckbomb]

"Between you and I"

or

"If you have any questions, please talk to the project manager or I"

People say and write these things all the time to sound smart, when in fact it makes them sound like idiots.

[CaptUnlucky]

You talk good