A term used in the British Royal Navy and Royal Marines.
It means that you are deliberately taking someone for granted in a way that negates their gesture (a very disrespectful thank you). It comes from suggesting that someone is 'easy' (i.e. easily taken advantage of)
Matelot 1: I picked up your dhoby from the laundry shipmate...
Matelot 2: Cheers easy!
Bootneck 1: Here you go pal - I made you a cup of tea...
Bootneck 2: Great. Cheers easy you cabbage!
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a bit like 'thanks for nothing'
what! you guys are going to Ibiza without telling me? cheers easy lads!
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