I think we're talking WW2 British army slang. apart from the look thing we called italian soldiers Dekkos - a soldier perpetually at the base therefore maintaining comfort and safety. i.e. didn't want to fight . unless someone has a better answer.
I had not heard of the Italian connection.
I remember one of my uncles returning from India after WW2 and using dekko and other Indian words picked up during his service there.
Jazzgirl's right about the word originating with the Raj but the later italian soldier bit is true as well. It does seem a bit non-pc for these sensitive times. if it is a typo it's a good 'un isn't it.