In a shadow boxing bout, Schmidt accidentally blackened Salter's eye.
Time cannot wither, nor custom stale, the infinite variety of his shadow boxing.
The attachments and suits were but the shadow boxing of the bout; the rough stuff was held in reserve.
1906; see shadow (n.) + box (v.2). To shadow-box (v.) is attested from 1932. Shadow-fight is attested from 1768; cf. also sciamachy.