Metre squared per second or square meter per second is the SI derived unit of kinematic viscosity and of specific relative angular momentum. The unit is written in symbols as m2/s or m2·s−1 or m2s−1.
Specific relative angular momentum
Specific relative angular momentum is defined as the cross product of the relative position and relative velocity. The unit may be better understood when phrased as "metre per second times metre", i.e. the velocity of an object with respect to a position.
References
Metre squared per second Wikipedia(Text) CC BY-SA