ATM is not a formal slang, but a casual acronym. It is common on the internet, but it is mostly applied in casual communication. Contrary to its other sense, Automated Teller Machine, in this case, serves as a short hand in day to day life. It is not typical of professional or scholarly writing, but it is quite all right in text messages, group messages, and comments on social media. ATM is a convenient digital form of expression as people can save time and exchange quick updates without typing entire sentences. Know more about atm meaning in text 

Interesting how ATM can mean both “at the moment” in texting and banking services in real life. Just like ATM slang helps people communicate quickly online, checking your ATM balance is still one of the fastest and most reliable ways to manage money instantly in the UAE.