Expressions used in Everyday Spoken English in Social and Professional contexts
When someone says ‘you have your work cut out for you’, it means that they think the task or work that is expected of you will be difficult or challenging. If there is a client for example who is very demanding you might warn your new colleague 'you have your work cut out for you with him', for example, to let them know you expect their work with the client to be challenging and difficult. This is a casual expression that you will find used in both social and professional contexts. Similar in meaning to 'an uphill struggle' and 'you'll have your hands full'.