ste ‧ roid /ˈstɪərɔɪd, ˈste- $ ˈstɪr-/ BrE AmE noun [countable]
[ Date: 1900-2000 ; Origin: sterol type of alcohol (20-21 centuries) (from cholesterol ) + -oid ]
1 . a chemical that the body produces naturally or that can be made as a drug to treat illness and injuries. Steroids are sometimes used illegally by people doing sports to improve their performance
on steroids
a body builder on steroids
2 . something on steroids American English informal used to say that something is much bigger, stronger, more impressive etc than something else that is similar to it – used humorously:
They sell cinnamon rolls on steroids.