1 definition by stephjk

Top Definition
Confusion and short term memory loss that happens during pregnancy.
"Hey placenta brain, what's the soap doing in the fridge?"

"My wife is such a placenta brain. Yesterday I caught her eating chalk. She said she needed the calcium."

"I gave a presentation to a group of women when I was pregnant. And I forgot my name! Must be the pregnancy brain."
by stephjk June 03, 2008

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