だよ!(よけいなおせわだよ!) Mind your own damn business!!   $$$
(かんしょう) To interfere. Less angry than 余計なお世話だよ! For instance, 干渉 also applies to science, like radio interference or electrical interference.  Also, 干渉 has the nuance of ‘get mixed up in’. A parent could tell their child, “Don’t get mixed up in a fight your friend is having with your other friend. Let them handle it themselves.”