The British version of "That's what she said."
Adding "Ooo'eerrr" after anything you say will put a sexual inference to it, making perfectly innocent sayings into thoughts of the orgy minded...The way to prounce it is OOOAAARRRRR, there is optional rolling of the r's.
The noise made when a bangable chick walks by or enters a room. Usually done at work. This lets your male co-workers know that there is poonane in the immediate area.
Worker #1 "Eee-Rrr Eee-Rrr"
Worker #2 "Damn shes hot!"
Worker #1 "Yea, I would not kick her outta bed... unless I was going to fuck heron the floor"!!!