A poorly built automobile. A piece of junk. The reason behind the name "Friday" is that workers typically had a long week, are tired, and are looking forward to the weekend... therefore, they are a lot more careless with the construction of the vehicle, lending to it's numerous problems.
This typically applies to a make/model of vehicle that is usually of pretty good quality, and the "Friday car" is more the exception than the rule.
Really bad cars can be referred to as "Friday afternoon at 4pm before a three day weekend car".
The unfortunate habit of n00bs, idiots, and morons to perpetually use the caps lock key, even when "yelling" is not implied. This is usually accompanied by other obvious examples of ineptitude, such as poor grammar, spelling, and total lack of punctuation or use of paragraphs.
They seem to lack absolutely any capacity to use a keyboard, and clearly struggle to achieve even the most basic of communication tasks, thus rendering them "handicapslocked".
"HI BRIAN I JUST WANTED TO LET YOU KNOW IM GOING TO THE BAR TONIGHT R U?" -Nicky, the handicapslocked.