(informal) Someone with exceptional skills in a certain field.

(transitive, slang) To give (somebody) a dose of recreational drugs deliberately laced with poison.

A telephone line that is always staffed and able to give immediate assistance. / A direct line between two people, especially one between heads of state to be used in an emergency.

To communicate over a telephone hotline.

Alternative spelling of hot dog

(intransitive, slang) To show off, especially in surfing and other sports.

Alternative spelling of hot pot.

Alternative spelling of hot rod

(Hinduism) Alternate form of hotr.

Pertaining to or characteristic of a hothead or hotheadedness; (of a person) easily excited or angered.