Top Definition
About an hour and a half slower than Eastern Standard Time.
Spencer: Where is Jeff? I thought we all agreed to be here at 10:00?

Ryan: True, but he is on McHale Standard Time (MST), so he won't be here until about 11:30.

Spencer: Oh right, I always forget the conversion.
by Notorious REB August 05, 2011

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug