Actually, Om Telolet Om is the sound of the Bus horn from Indonesia passing the district of Jepara. We can say that om telolet om is an onomatopoeia (the formation of a word from a sound associated with what is named (e.g., cuckoo , sizzle )). According to me it is ‘Bus Horn Sound Effect’ from Indonesia.
This trending appeared firstly in Jepara, Central Java, Indonesia. Because of their unique sound, many children waited them on the roadside while holding up the banner made from used cardboard with ‘om telolet om!!!’ note.
So what is the meaning of om telolet om onomatopoeia? Actually, it is an asking of the children, standing on the roadside, to bus drivers to sound or honk their bus horn so they can hear the sound of the horn ‘telolet…. telolet…. telolet…’
Whereas ‘om’ itself means ‘uncle’. It is a call for a men who are older and already married by children in Indonesia. If you are visiting Indonesia and meeting a man than older than you so you can call him ‘Om!’ to greet him. It is the sama as when you are greeting people in your country.