mun /mʌn/noun 3pronoun 1verb 1forms 2 noun3 •(dialect, UK) man •(Internet) The person who roleplays a character in a role-playing game, especially an online play-by-post one.Jade grabs a handful of brownies and nibbles on then,^([sic]) trying to keep her mun from reaching right to the screen to get some[…] — 1997 •(dialect, no longer used) The mouth, jaw.A common cry at Coventry on Good Friday is: One a penny, two a penny, hot cross buns, / Butter them and sugar them and put them in your muns. — 1847 pronoun1 •(dialect, no longer used) them verb1 •(dialect) Must.Ye mun ha' done wi' all that foolery — ye're gettin' a man now, an' ye mun give over that nonsense. — 1894 formsMUNs · muns