Old Gregg is a surreal character from the British cult comedy series 'The Mighty Boosh,' specifically appearing in the episode 'The Legend of Old Gregg.' Portrayed by Noel Fielding, Old Gregg is a merman living in the depths of Black Lake, known for his green skin, seaweed hair, and obsession with Bailey's Irish Cream. The character became an internet sensation in the mid-2000s after the clip went viral on YouTube, spawning countless catchphrases like 'I'm Old Gregg!' and 'Do you love me?' The meme is typically used to evoke a sense of bizarre, uncomfortable humor or to reference the absurdist nature of the original sketch.