megasecond 

Longer than 1 second but shorter than two.

Wait there, I will just be a megasecond (megasec)

megasecond by natnatnat_ August 25, 2008

Melisecond

The measure of time one's marriage engagement lasts. (Suggesting, that it ended abruptly by one of the parties)

That is odd, it seems as though Jason and Melissa's engagement only lasted for a melisecond.

Melisecond by TommyboynTX March 5, 2009