The phrase is most commonly associated with TikTok and Instagram Reels background audio. It often accompanies comedic "fail" videos, rhythmic dancing, or repetitive motions that sync with the "Tit Ti Ti" beat.
The characters shown in your query ( ШЄЩЉ... ) appear to be the result of a (often called Mojibake). In the standard UTF-8 encoding, those characters represent: تيت (T-y-t) تي (T-y) تي (T-y) Cultural Context and Usage @Tit Ti Ti ШЄЩЉШЄ ШЄЩЉ ШЄЩЉ
This represents the phonetic sound of the beat or chant. In many dialects, it mimics a rhythmic pulse or a playful "ta-ta-ta" sound used to get attention or set a tempo. The phrase is most commonly associated with TikTok