Top definition
Mach 1 is the speed of sound and is 767.269 MPH.
You have to go at Mach 1 to create a wormhole.
via giphy
by Squap Shmoop April 28, 2016
Mug icon

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