Swinter: The combination of summer and winter together.
Candace: Swinter?!
Phineas: Some people call it wummer.
by lykeomgzzzzzgirl June 27, 2009
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A season, especially prominent in the eastern US, characterized by days of winter weather followed by a day of summer weather.
"Damn yesterday it was 70 and sunny but now it's 35 and snowing."

"Yeah man, I guess it's swinter."
by Brunered April 16, 2014
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To gain weight to survive the winter. A lot of american do this to look hotter for next summer. All the oil from their fatty skin is often lit on a candle, during Swintereen on the 31st of October.
Hey everybody, ready for swinterin'?

Sorry Bud, can't move I'm swintering?
by MonkeyGod October 27, 2014
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when you dress in winter AND spring clothes in one outfit

(tank top, heavy jacket, jeans, flip flops)
Liz: cute outfit, but isnt it too cold for a tank top and flip flops?

Lody: no, its my swinter outfit/attire
by equestrian4lyyfe March 31, 2012
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Winters in the South-eastern United States where there are only a handful of days with snow and the rest are cold, rainy, or both
Truly ghastly weather,
I just hate Swinter!
by Chatteringduck January 3, 2022
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Feb 2 is Groundhog Day but the way the weather feels its swinter outside
by SoufsidePrince February 2, 2023
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