to do something which is not very interesting while you are waiting to start doing something more important.

She's just marking time in her father's shop until it's time to go to university. (usually in continuous tenses)

• have your hand in the till
• have your hands full
• have your head in the clouds
• have your head screwed on
• have your head screwed on right
• have your head screwed on the right way
• have your head stuck up arse
• have your head stuck up your arse
• have your head up arse
• have your head up your arse
• have your heart set on
• have your heart set on doing something
• have your heart set on something
• have your knife into
• have your knife into someone
• have your mind on
• have your mind on something
• have your moments
• have your name in lights
• have your nose in a book
• have your nose in the air
• have your pick of
• have your pick of something
• have your share of
• have your share of something