o shit Share definition Flag a phrase one uses when one is suprised by something and/or learns/realizes something new that is unexpected. Also used to express oneself during sex. o shit, what the fuck was that? o shit, i didn't know she was pregnant. o shit...oh shit...etc. o shit by m-t-a July 1, 2006 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