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 TotallyNotArden May 13, 2022
Get the Mossmug. The green algae growth on an individual's teeth as a result of the lack of practicing good dental hygeine.
Henry - Did you see Baker's green teeth this afternoon?
John - Yep, they were overgrown.
Henry - He probably will need to use a weed eater to cut that tooth moss!
John - Tell me about it. He's fuckin' disgusting.
John - Yep, they were overgrown.
Henry - He probably will need to use a weed eater to cut that tooth moss!
John - Tell me about it. He's fuckin' disgusting.
by Meat Teeth March 18, 2014
Get the tooth mossmug. 
by You trina moss? November 16, 2019
Get the Mossmug. 
Get the Mossingmug. by WaltMo4 August 30, 2017
Get the mossed emmug.