Sucks to your Auntie means: You can also say “Yo MA” or “Yo FACE”, but this is a more sophisticated and intelligent way to express your feelings. This phrase was first used in the book “Lord of the Flies”, written by William Golding. You can also use it for “Sucks your assmar”, another famous phrase in ‘Lord of the Flies. (in Community Dictionary, added by Reyna Hopkins)