Its a funny story

Something you say when you know your screwed, and your thinking of a way around it.

Jim - "Dude, why are you driving my car?"

Dave - "Its a funny story really-"

Jim - "Shut the fuck up and get out of my car."

Dave "Ok...."

you know its funny how

Something a girl says after you ask whats wrong. You messed up in some way and she thinks you know about what you did. Usually done over text.

you: whats wrong?
Her: nothing....
you: oh okay
Her: You know its funny how...

its not funny

when someone does something bad a numerous amount of times despite how many times theyve been told off for it

mum: its not funny how many times i have ive told you to stop going at bed at 6:00am and you still wont listen!
me: sorry im busy watching youtube i cant help it