From Longman Dictionary of Contemporary Englishbe (like) a drugbe (like) a drugif an activity is like a drug, you enjoy it so much that you want to do it more and more Athletics is like a drug – it keeps dragging you back for more. → drug
Examples from the Corpus
be (like) a drug• Of those held in federal rather than state prisons, 60 % are drug offenders with no history of violence.• Casodex is a drug that blocks the release of testosterone, a hormone that is linked to prostate cancer.• The robber bridegroom could be a drug pusher in-stead of a homicidal cannibal, for instance.• At 17 he was a drug addict.• The most worrisome cross-border export, however, is drugs.• I would have loved a drink, but I thought it might be drugged.• The more complete descriptive term is drug elimination half-life.• Tobacco is a drug and addicts should be given a chance to ease off gradually. 