When someone has done something which causes you anger and displeasure. You respond by throwing down any item which you are currently holding and yell: "NOT COOL!". Of great importance: the item which has been throw down is now considered community property and may be taken by anyone witnessing said event.
Cool Guy: (walking into a room of friends/coworkers eating burritos) Dude, where's my burrito?
Not Cool Guy: I think they forgot to make it. Or maybe I forgot to order it. (smirks)
Cool Guy: (throwing down container of guacamole -- which he intends those in the room to now eat) NOT COOL!
Not Cool Guy: I think they forgot to make it. Or maybe I forgot to order it. (smirks)
Cool Guy: (throwing down container of guacamole -- which he intends those in the room to now eat) NOT COOL!
by not cool guy eating a burrito January 14, 2014
 Get the Not coolmug.
Get the Not coolmug. by xXjArInXx May 15, 2016
 Get the coolmug.
Get the coolmug. by ophelia November 29, 2003
 Get the coolmug.
Get the coolmug. by Emma N. M. June 5, 2007
 Get the Coolnessmug.
Get the Coolnessmug. by El Fredo April 11, 2004
 Get the Coolnessmug.
Get the Coolnessmug. An adjective referring to something that is very good, stylish, or otherwise positive. It is among the most common slang terms used in today's world.
by Ainolketta February 19, 2005
 Get the coolmug.
Get the coolmug. A word that describes someone or anyone or anything that is interesting and well liked. Cool is over used and often to general and used for things that are often only a fad. The things and people that are in actual fact cool don't care about being cool.
by Stui September 15, 2005
 Get the Coolmug.
Get the Coolmug.