I will try to provide you with deeper understanding of that phrase :) The whole phrase is a game with the interjection 'ох!' that matches 'oh!' in English. The middle part (хохонюшки) is the interjection with the suffix adding loving and tender meaning. You can encounter this in a conversation between a mother and her toddler, in fables but hardly in the real life.

это означает "я не знаю что делать дальше". Используется в сложной жизненной ситуации. Стало популярно после мульфильма "Маша и Медведь. It means a "i don't know,what to do next" It usually use in a a difficult situation in life. It was became popular after cartoon "Masha and the Bear".

= ох = ой = как же так! = боже мой! = OMG :) В жизни практически не используется, только в сказках, мультиках и т.д.

just exclimation , rather sad one