American living in UK shares confusing phrase that means something completely different in US

Despite being extremely similar, there are a few differences in American and British English that could make life in the UK difficult to navigate. One man has explained a common phrase he thinks would baffle those across the pondDespite being extremely similar, there are a few differences in American and British English that could make life in the UK difficult to navigate. One man has explained a common phrase he thinks would baffle those across the pond