bô-tī-tāi無底代

to have nothing to do with

to have nothing to do with; to matter little; to be irrelevant; to not be a hindrance; to not be in the way

English Wiktionary, “無底代” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E7%84%A1%E5%BA%95%E4%BB%A3 · confidence: Medium (Wiktionary)