This meme sound comes from DaBaby’s well-known “Let’s go” ad-lib, which spread widely through short edits, reaction clips and bass boosted reposts online. The boosted version became especially popular because the extra low end makes the line feel abrupt, funny and exaggerated in a way that suits meme timing. It is still used when creators want instant energy in a very short clip, much like other loud reaction sounds such as oh my god, wow! or DAMN!!!.