见鬼 is a separable verb (离合词) literally meaning 'to see a ghost'. It's far more common as an exclamation expressing anger, frustration, or surprise — equivalent to 'Damn it!' or 'Go to hell!' in English. The verb 见 can split from 鬼 to insert particles or modifiers, e.g. 见了鬼了 (lit. 'have seen a ghost', used as an exasperated exclamation resembling 'What the hell?').