steroid

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steroid /ˈstɛˌroɪd/ noun
plural steroids
steroid
/ˈstɛˌroɪd/
noun
plural steroids
Learner's definition of STEROID
[count]
: a natural substance that is produced in the body
: anabolic steroid

on steroids

: using anabolic steroids
US, informal + humorous : very large or impressive