It is the English equivalent of "Iike I care" usually people used in a very low register, this isn't something you would say in formal talk but only with your friends. Sometimes it is used to say we don't care about what others think or say.
1) You're celebrating with your friends in a restaurant and you're being very loud, your friend tells you: keep your voice down men everybody is watching!
You say: Fottesega ( I couldn't care less)
2) you're all going out but someone you don't like particularly is late, you want to leave but your friend tells you : if we don't wait for her she'll be mad at you
You replay: Fottesega!
You say: Fottesega ( I couldn't care less)
2) you're all going out but someone you don't like particularly is late, you want to leave but your friend tells you : if we don't wait for her she'll be mad at you
You replay: Fottesega!
by Italiannativespeaker May 19, 2019