Hahahh. Here it just means your unwanted or filthy. Or the other way your durable and hard to get rid of.
I have actually never seen a cockroach in my life. I quess they dont really like the cold here.
But that pictures just somerhing i fould on pinterest after searching suloinen torakka. (Cute cockroach)
Here it means you support a "youth movement" called CJP (cockroach janata party), and its followers are some of the stupidest people I have met.
To be brutally honest it's a leftist organization, and well, I am too lazy to type, so just research about it yourself if you are interested.