Oversexed, overpaid, overfed and over here

American soldiers in the UK in the late 1940s had a a terrible reputation. Besides the cliche of being 'oversexed, overpaid, overfed and over here', there were other crude stereotypes such as the one about British girls' knickers ('one Yank and they're off').
Soldiers like Keith, who served in the Royal Canadian Air Force, were identifiably not American because he wore a different uniform. But his style of talking, and the things he talked about, would have made him and his Canadian buddies seem more like Americans.
http://www.phrases.org.uk/meanings/oversexed-overpaid-and-over-here.html