This sound comes from the vocal style of Boyfriend, the main character in Friday Night Funkin', the indie rhythm game released in 2020. The game's songs use pitched beep-like voice clips instead of full spoken dialogue, which made Boyfriend's sound instantly recognizable. Short isolated Boyfriend noises spread widely in meme edits, reaction clips and gaming posts because they communicate the game's identity in a split second. The sound is still used by fans whenever they want a quick FNF cue without dropping in a full track.