This is the 6327th most frequent Turkish word.
i̇stanbulsporlu
A person who supports or is a fan of the Istanbulspor football team.
In this sentence, 'İstanbulsporlu' is used as an adjective to describe being associated with İstanbulspor, generally as a supporter or fan.
İstanbulsporlu olmak gurur verici bir duygu.
Being an İstanbulspor fan is a proud feeling.
Here, 'İstanbulsporlu' is used as a noun representing a person who is a fan or supporter of İstanbulspor.
Geçen hafta bir İstanbulsporlu ile tanıştım.
Last week, I met someone who supports İstanbulspor.
In this sentence, 'İstanbulsporlu' acts as an adjective modifying 'futbolcular' (players) to specify their association with the team İstanbulspor.