Said to acknowledge a double entendre or something that sounds rude(interjection)
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Use "oo-er" in a sentence
"At the top there we have Lost Girls (bit rude that you know!), and some other big hardcovers (oo-er) such as Love and Rockets, Cages."
"The Big Ten Inch, LondonDespite sounding like a night dedicated to Carry On-style family-friendly smut and constant calls of "oo-er missus" coming from somewhere behind the bar, The Big Ten Inch is actually a rather sophisticated affair, musically at least."
"So to quote the famous Georgia Nicolson: I was being the prologue person and I was giving it my all at the front oo-er."