I'm sure there will be many more additions to this list as time goes by and we learn more words.
Rubbish: trash, also used as an adjective, "the weather today is rubbish."
Bin: trash can
Boot: trunk of a car
Lorry: large commercial truck; like a tractor trailer, but smaller
Crisps: potato chips
Chips: french fries
Trolley: shopping cart
Mobile: cell phone
Keen: same definition as what we know, but it's used all the time. "He's very keen on going to the football game."
Football: actually means soccer
Pants: girls underwear
Trousers: the proper word for the things you put on your legs
Chancer: a slang word said about someone who's being sneaky, conniving, rude, etc.
Make Tracks: used often when someone is saying they need to leave, "I'm going to have to make tracks now, it's getting late."
Car Park: parking lot.