お母かあさんっ子こ

noun

mother's boy; mother's girl; mama's child

Refers to a child (of any gender) who is very attached to their mother. Often used affectionately or teasingly.

• うちの息子むすこはお母かあさんっ子こで、いつも私わたしの後あとをついてくる。

  My son is a mama's boy and always follows me around.

• 彼かの女じょは小ちいさい頃ころ、お母かあさんっ子こだったらしい。

  Apparently she was a mama's girl when she was little.