expression
Very casual abbreviation of あけましておめでとうございます, used mainly in informal speech, text messages, and social media among friends.
See also: あけましておめでとうございます
あけおめ！今年もよろしくね。
Happy New Year! Looking forward to another year with you.
友達から「あけおめ」ってLINEが来た。
I got a LINE message from a friend saying 'akeome'.