замедленная реакция(напр.на что-то новое – It was one of those slow builds that people weren't quite sure what they were about to hear. It's a fresh artist they hadn't heard before lady_west)
высмеивать(Most of Twitter slow-clapped the performance of the German ice skater cosplaying Jaime Lannister and dancing to the Game of Thrones theme fluggegecheimen)