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English definition of “OD”

OD

verb [I] uk   /ˌəʊˈdiː/ us    /ˌoʊ-/ (present tense OD's, present participle OD'ing, past tense and past participle OD'd)
slang to take an overdose (= too much) of a drug: She OD'd on heroin and died. informal humorous to have too much of something, often food: Nothing more for me, thanks. I think I OD'd on chocolate cake.
OD
noun [C] uk   (plural OD's) mainly US slang us  
(Definition of OD from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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