A term of endearment. Usually referring to a male family member or close friend. Could also be used in the context to show love for someone. Lastly, it may refer to the beautiful/innocent nature of something or someone.
Could also be altered to specifically illustrate a certain person (i.e. Babynumce, Mothanumce, Sistanumce, etc.)
As in Eddie Murphy's movie "The Golden Child" he welcomed his enemy sarcastically in the airport saying, "Well it's my dear sweet brothanumce!"
"What a cute baby! He's a brothanumce!"