Yes Ibuprofen is a blood thinner.
When you take Ibuprofen your blood will thin out which is good sometimes as it can help prevent blood clots and taking Ibuprofen daily may also prevent heart attacks, strokes, heart disease and yes blood clots.
However when your blood gets too thin and you get cut then you may not be able to stop the bleeding as fast but you still can stop the bleeding.
If you have issues with blood clots forming then taking Ibuprofen can help keep your blood thinned out which can prevent those blood clots.
But sometimes you still need a prescription blood thinning medicine if you're prone to blood clots or you may need your arteries cleaned out and need stents put in.