A phrase used when nitpicking small problems in computer software, sarcastically portraying something that is barely noticeable as so bad that they can't even stand to use the software any more.
See that menu? They are using "they're" instead of "their." Literally unusable.
Unphasable is a condition where nothing can harm you. It is a mental state on omnipotence where an individual cannot be phased and is almost God-like. Someone that is Unphasable can perform any task known to man with ease.
Tony Montana was so pumped up with cocaine that he was pretty much Unphasable to heavy machine-gun fire.
Dr. Manhattan from the comic-film The Watchmen is clearly Unphasable.
Bill Gates's finances are Unphasable, even in the hardest economy.