Someone who is a know it all but when challenged on a topic they profess to be a genius about they can't front up - just like moss they have no depth / roots
He's moss
by Busface February 13, 2015
Get the Mossmug. by moonymagic May 19, 2021
Get the mossmug. Someone who is a know it all but when challenged on a topic they profess to be a genius about they can't front up - just like moss they have no depth / roots
He's moss
by Busface February 13, 2015
Get the Mossmug. by anonymous November 17, 2020
Get the a mossmug. 
A fetus that grows from semen on the ground of a mossy section of a parking lot or other drivable surfaces.
by NevDIEMON February 25, 2024
Get the moss babymug. 