The observed chronological disparity seen in an object travenling to another dimension via trans-dimensional wormhole. Total time elapsed is dependant on the distance of the dimension. Typically, the further it is, the longer it takes (usually approximately 6 hours earth time to travel from one dimension to the next), although to the object traveling in the wormhole in question, no time seems to have elapsed (as one would experience traveling through a wormhole, trans-dimensional or otherwise).

to tell someone to calm down and relax.