This is someone who puts themself to be a great person who follows their faith of Islam but could really care less about it until Ramadan comes along.
They may even go on social media rambling about how holy the month is and quotes and whatnot. (all for one month)
Adam: “I heard Sarah is really religious”
Omar: “No she’s just a Rammy Muslim”
Adam:“Oh, that makes a lot of sense actually”