The act of being silly
Helen, don't be silly = Helen, stop silling.
by KrisC January 31, 2008
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1. The most wonderful name in the world. It often comes from the name Cecilie, but 'Sille' is a much prettier version of 'Cecilie'!

2. The name is always given to beautiful, lovely girls. If you ever meet a Sille, you are very lucky, and you better keep her!

You can also name pets "Sille"! For example a cute turtle.
Dude: Have you ever met Sille?

Dude2: OH, sure!! She is very pretty, right?

Dude: Yes! then you have met her
by Kridz December 30, 2011
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A descriptive noun used in place of someone that is truly an epic prankster.
by sillysill88 March 26, 2019
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A slang word used in place of Silly.
Thats so sill!

She is so sill!
by tiewashere March 17, 2007
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When a thing or action is with sick and chill
"Dude how sill was it when your dog found out herb and brought it to us on the couch"
by Darth-vaper December 3, 2019
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the combination of the words sick and ill.
daaayummm b that whippp is sill s0n
by lyse December 24, 2007
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