kalakuta | कालकुट
kalakuta (Devanagari: कालकुट ISO15919: kālakuṭa) is the deadly poison that demoness Putana smeared on her breasts to kill 6 day old infant Krishna.
This poison is so deadly that one does not need to ingest it. Putting it on the lips is enough to cause death.
REFERENCE
Prema Rasa Madira - The Intoxicating Bliss of Divine Love, Vol. 1, Ch. 7