The hardest question you'll find in a math test

If the era of the dinosaurs isn't justified, why should this equation be?

Its a very simple math problem, but yet its freaking hard at three in the morning without coffee.

1.) A post in a forum/message board that indicates the person agrees with a previous or quoted reply to a thread.

2.) Shorthand for "My thoughts exactly" or "me too".

Used to represent a sly grin or a smirk in an Instant Message or SMS conversation.

When you are so excited or so angry that you lift your hand off the shift key to early and accidentally put a "1" at the end of your numerous exclamation marks.

Common typo among people who like to insert many exclamation points to the end of a sentence, caused by accidentally releasing the Shift key before the 1 key, and sending the message without previewing it to realize the typo had been made.

Often used on purpose to make fun of such accidents and the people who make them, or as part of leetspeak.

A similar but less-joked-about occurrence is the tendency to insert backslashes after a string of question marks.