What is Iseult?
1.
The act of drunkenly doing something incredibly psychotic whilst maintaining a fairly evil smile. Very commonly found to happen in Student Bars.
"Holy shit, she just gave those guys a complete Iseult with that table-full of empty glasses"
"Please don't Iseult me!"
"It's not big and it's not clever, it's just Iseult."
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2.
irish for amazing, celtic princess and utter beauty
that iseult girl is one i would like to fuck
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