Top Definition
When a teenage girl who baby-sits talks to everyone as if they’re 8 years old and is always in a falsely chipper mood.
“You saw a movie last weekend?! That’s awesome! How was it?!”

“You know what, Becky? Legitimate question: Why are we friends? This babysitter syndrome is pissing everyone off. Honestly, what do you bring to the table?”
by The Earl of Teabag September 14, 2007
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