Here is a small article from YANK MAGAZINE pertaining to a British Government booklet titled, "When You Meet an American".
The publication was widely distributed to British girls during World War II in order to help them understand that unique brand of English spoken by American soldiers:
"Try not to appear shocked at some of their expressions...if a lad from back home asks for a hot dog he actually means, 'fried sausage in split rolls'...'Hi'ya baby!' is legitimate".
There can be little doubt that the booklet served its purpose well. By the end of the war there were some 20,000 children born to British girls by American service personnel.