The 'Fahh' meme, often associated with the character commonly referred to as the 'Bho' fish, originates from a background character in the animated series SpongeBob SquarePants. Known for its distinctively wide-mouthed, bug-eyed expression and a specific sound effect, the image became a viral reaction tool across social media platforms like TikTok and Twitter. It is primarily used to convey a sense of being stunned, disgusted, or completely caught off guard by a situation. The meme's humor lies in the fish's exaggerated facial features, which perfectly capture the universal feeling of a 'brain freeze' moment or a reaction to something absolutely nonsensical.