an unmarried man; a single man; also written as 光棍儿 guāng​gùn​r or 光棍儿汉 guāng​gùn​r​hàn

a ruffian, gangster, or local bully; a low-life

(dialect) a brave, astute, or wise person who understands the situation; a tough guy or man of character

a cheat, con artist, or person who lives by their wits or deception

(dialect) a wise person; one who understands the situation and knows how to avoid immediate losses