A composition of the words "temporary" and "relationship". It is when two, or more parties agrees that a relationship should only be temporary.
As opposed to most people, who are serial monogamists, people who agree to a templationship are aware about their situation.
It is ideal when you know you're not suited or compatible for long term, but you have intense chemistry and enjoy spending time with each other. Templationships are mostly exclusive in nature, but can also not be. It is defined by the people agreeing to it.
Jane: Have you heard? Sarah and Josh are finally dating!
Laura: Yeah, but Josh wants kids down the line, and Sarah has other plans. I am pretty sure they agreed to a templationship!
2. Transmitting an unintended message by accidentally pressing the space bar.
3. Insulting your friend with an unintentional response to their status update because you didn't realize facebook changed the format for entering text without the need to press the "enter" button. And to make a new paragraph, you have to hold the shift key + space.
I prematurely tabulated when responding to my friend's facebook status by typing what I would really like to say but shouldn't and transmitted the unintended message by accidentally bumping the space bar. I dislike premature tabulation!