Chilla Share definition Flag A derogatory Spanish slang term used to describe the mistress, or the side chick. "I'm his wife you're nothing but his chilla." Chilla by Derka915 February 5, 2009 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