look up any word, like fleek:
 
1.
a. to be polite and to respond timely to invitations because you shouldn't be a douchebag and say MAYBE to an invitation because you know people have to fucking cook for a certain amount of people!!!

b. to talk to other guests at a dinner party and not avoiding eye contact and acutally listening to the hostess when she says "please sit down"

c. not being a major douchebag
"hey, can you sit down and have some common courtesy for your hostess?"
by kimmywong December 31, 2005
 
2.
That new, amazing album by pop punk/metalcore wondergroup A Day To Remember.
Have you heard the new ADTR album?
What, Common Courtesy, it's f**king amazing!
by Welchy720 October 09, 2013