The crossword solutions for the term PHONE, SLANGLY are HORN, which is a four letter word. HORN is a device that produces sound when air is blown into it or when a mechanical vibrator is used. It is commonly used in musical instruments such as trumpets and trombones, as well as in alarm systems. In the context of phones, horns are used to amplify sound and make it easier to hear. Slangly is an informal way of speaking, often using words and phrases that are not part of standard English.