This was the exact outfit i was wearing and boys shouted “cle*vage cle*vage”

This sweater and jeans. This is what i was wearing. I was walking back to my home. These 3 boys were not more than 15, not even in 10th and this is how they were behaving. And they were on bike, high speed.
Now some people will say "you should have done smth". What would i do? WHAT?? I was in shock, complete shock. Mind went blank. I just walked off and didn't say anything. I hope they get lesson, soon.