How to use good "good luck " good luck i know the original meaning hope you savety ,such as when you have a trip,your friends say "good luck",hope you back safety. But i don't know "good luck "is that have bad meaning?Such as :you love a girl,you want to become his boyfriend and you told you friend this things,so you friends said"good luck"(they said very deeply and sound very good ),so in this situation "good luck “ is that means you will never pursue her?