Ts and Bs en · NOUN
Meanings
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(informal, plural, plural-only) Ts and blues.
[…] was usually combined with the antihistamine tripelennamine (“Ts and Bs” or “Ts and Blues” pattern of combined intravenous drug abuse).
1990, Martin W. Adler, Alan Cowan, editors, Testing and Evaluation of Drugs of Abuse (Modern Methods in Pharmacology; 6), Wiley-Liss, →ISBN, page 272: