fella Share definition Flag Any male. Fella's = A group of males. Is NOT a synonym of friend/pal/mate. Q: "What are you doing tonight, big fella?" A: "Just smoking at my hut, a few fella's are coming over." fella by Diego November 8, 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