Poison, deformed spelling of яд. Usually used in the sentence выпей йаду (drink poison) to underline one’s disagreement with the opinion of somebody else (who should therefore rather leave this vale of tear voluntarily).
Йад — общее название душехолодительных напитков на основе диокситрихлорметилбутилпропилэтиленпропиленхурдымурдыоранж.
Poyson: general name for mind-cooling drinks made from dioxytrichlormethylbottomsupethylenpropylenmumblejumbleorange.