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1.
ADJECTIVE:
Marked by or possessing a high degree of sophistication; refined: “Many picnics manage without this sophistication, but we like to be couth and feel that the delicacies of gracious living enhance the chances” (John Gould).
noun:
Refinement; sophistication:1. "The man has no couth" (Los Angeles Times).

2. "Frank,did you just fart? , man you got no couth."
by zach July 28, 2004
 
2.
sauve; smooth cool hot
Weymouth is very couth with the ladies.
by Thomas January 20, 2005
 
3.
Smooth, showing or having sophistication. Good manners; refinement.
Sending her flowers would be a very couth thing to do.
by troy gander April 16, 2009
 
4.
couth is what the uncouth certainly dont have. couth saves you from ugly table manners, being filthy, and crude language (usually "potty talk").
john, have COUTH!
or,
nina, have COUTH!
by grace April 06, 2005