A girl who is fun, hot, smokin and has big boobs.
Did you see that girl and how she was a siobhan.
by gweg18 April 27, 2011
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The most unreliable, thick, fucking retarded person ever. Don’t get involved with a Siobhan. They’ve got issues.
Person 1: Siobhan punched me in maths.

Person 2: why?

Person 3: I spoke to her.
by LiterallyJesus March 06, 2019
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a short elf with long thick multicolored hair. She does things to guys in parks.
my friend siobhan is SO SHORT. almost ELFLIKE
by gibbz October 20, 2007
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Siobhan is a well known power top. Siobhans could destroy you in an instant.
Boy: Haha Siobhan is such a bottom
Siobhan: Bold of you to assume
by BingoBongoo September 29, 2019
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