Penoy and balut are duck eggs sold by roaming vendors in the Philippines, with balut being a fertilized egg and penoy an unfertilized one, both eaten hot with salt or vinegar. Vendors traditionally call out the names at night as they walk residential streets, a sound generations of Filipinos recognize from home. Short clips of that call spread on Filipino social media and soundboards as a nostalgic meme, reused whenever a video needs an instant street food cue or a playful reminder of late night snacking culture.