the basic, practical details of a job or other activity.

Law school teaches wonderful theory but it doesn't teach the nuts and bolts of actually practising law. (often + of)

• have nothing between your ears
• have nothing going for
• have nothing going for it
• have nothing going for you
• have nothing to do with
• have nothing to do with someone
• have nothing to do with something
• have no time to lose
• have no truck with
• have no truck with someone
• have no truck with something
• have no use for
• have no use for someone
• have no use for something
• haven't lived
• haven't lived until
• haven't lived until something
• haven't seen hide nor hair of
• haven't seen hide nor hair of someone
• haven't seen hide nor hair of something
• have number
• have off pat
• have on a short leash
• have on a string
• have on a tight leash