
What are you, etc. on?
Drug Inference
Used when someone's behavior suggests they may be influenced by drugs.

He's laughing at nothing. What are you on?
Caution Required
Sometimes a sensitive question, implying drug use. Use with people you know well.

You're so hyper today. What are you on, buddy?
Joking Tone
Often said in a joking or playful manner among friends.

You just solved that in seconds. What are you on, a genius pill?
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