Imaam Muhammad Ibn Saaleh Al-Uthaymeen (rahimahullaah) said:
[الطبوليات ] are those Masaa-il (affairs of the religion) by way of which fame is sought. They are called Tubooliyyaat because it is similar to a Tabl (drum) which has a sound and an echo. So when an odd affair (i.e. an affair that is exaggerated or exceeds the proper boundaries of the Sharee’ah) comes to the people and a (person) becomes famous by way of it, then it becomes as if it is the sound of a drum.
[Source: Sharh Hilya Taalib al-Ilm, page: 19]