this is a term of endearment used for couples crazy in love that are way past the early days of whispering sweet nothings like 'you're beautiful' or 'you smell nice.' If you tell your beloved they are a stinky baby then they know you really love them.
andrew, you're my stinky baby.

stinky baby get over here and give papa bear a hug!
by suzyhart October 19, 2007
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a stinky baby is simply someone in your friend group who either acts immaturely when it comes to din dinns or beddy baws, or someone who always complains.

You should always react to a stinky baby by saying "Waaaaaaaa" to mock them for being a stinky baby
Person 1 - "That Glenn character is such a Stinky Baby, is he really going to bed at 9pm?"
Glenn- "I'M NOT A STINKY BABY SHUT UP SHUT UP STOP NOOOO IM NOT A BABY!!"
Person 1- "WAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"!
by Fuck the Tories haha February 16, 2020
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The absolute WORST word you can call somebody. This word is worse that Poopy Head! If a federal agent catches you saying this, they will shoot you on the spot and nuke the entire world.
Friend: Fuck you, your a peice of shit.
You: Your a stinky diaper baby.
Friend: (Fucking explodes)
Federal Agent: (Fucking shoots you and nukes the whole world)
by Some random middle aged guy November 1, 2023
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