A member of Labour Students. Sometimes, but not always, a term of abuse. Widely used by student activists.
It came about a while ago, when Labour Students was officially called National Organisation of Labour Students (NOLS) - hence "nolsie". The name has vanished but the nickname hasn't.
The nolsies have all got their tongues up Tony Blair's arse.
Don't vote for him, he's a frigging nolsie.
Me? No, I can't support your campaign, I'm a nolsie for goodness sake.