daks Share definition Flag Australian. Trousers, usually a bit more formal than jeans. Hence underdaks and trackie-daks I always make sure I have a pressed pair of daks for the first day back after the holidays. daks by Joan December 21, 2003 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug