Bangır bangır is an onomatopoeic phrase in Turkish that vividly describes a loud, blaring sound, often associated with music or noise. It's much more expressive than simply saying "loudly."
In Gülşen's song, it sets the scene for a defiant and energetic mood, with the music playing "bangır bangır" (blaring loudly) as she confronts someone. This phrase is memorable and captures the song's bold attitude.
Bangır Bangır is Gülşen turning the volume all the way up on someone who got too comfortable. It opens in a packed room: "Yanım çok kalabalık sesin gelmiyor bağır" (It's crowded around me, I can't hear you, shout). Then "Müzik son ses, bangır bangır" (Music at full volume, blaring). Bangır bangır is a Turkish sound word for something loud and booming, the way English says "blasting". She even warns him that she has put on "ağzı bozuk şarkılar" (foul-mouthed songs) that might be "biraz ağır" (a bit heavy) for him. Nothing in the lyrics actually swears, so read it as attitude.
The chorus is pure trash talk, and it is great fun. "Gül gibi uyuyan yılanı uyandırdın" (You woke the snake that was sleeping like a rose) means he poked a calm woman until her sting came out. "Garanti bildin beni, havalandın" (You took me for granted and got full of yourself). Calling him evladım (my child) in "Neyine güvendin evladım?" (What made you so sure of yourself, kid?) is a classic Turkish put-down, the tone an aunt uses on a cheeky teenager. My favourite insult is "etkisiz eleman, sıfır aldın" (a neutral element, you scored zero). Etkisiz eleman is a maths term for something like adding zero: without her, he changes nothing.
Then she plays cop: "Yavrum kaldır kollarını, teslim ol etrafın sarılı" (Baby, put your hands up, surrender, you're surrounded). "Sabret af çıksın sana" (Be patient and wait for an amnesty) keeps the prison joke going. "Ben öptürcem bu evin yollarını" (I'll make you kiss the roads to this house) is an idiom for making someone beg to come back. It is a bit much, and that is the point.