Bagsman means: British football slang for a prolific goal scorer - a player who reliably 'bags' goals. The term comes from the verb 'to bag' (to score), and implies consistent, reliable finishing rather than a. It is informal slang, fine in casual speech but not suited to formal contexts. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. It is sporting vocabulary and harmless in itself.