The term 'SEND A QUICK MESSAGE TO' can be solved by two crossword solutions: TEXT and PING. TEXT is a four letter word that refers to the act of sending a message electronically, usually via a mobile device. PING is also a four letter word that refers to the act of sending a short message over the internet to another user in order to check if they are online or to get their attention. Both TEXT and PING are commonly used to send quick messages to someone.