Turps vs Undefined - What's the difference?

As a noun turps

is (informal) turpentine or turpentine substitute.

lacking a definition or value.

(-)

(informal) Turpentine or turpentine substitute.

(slang, Australia, New Zealand) Any alcoholic drink.

* 2005 , Paul Smitz, Australia & New Zealand on a Shoestring , page 72,

Generally, big nights on the turps take place in The Rocks and around Kings Cross — where you'll hear and smell the action pretty quickly.

* 2006 , Gregor Paul, Hard Men Fight Back: Kiwi Sportsmen Who Beat the Odds to Live Their Dream , page 199,

Crazy sessions on the turps were all part of the culture.

* 2010 , Alex Bartoli, Rachel: A Story of Obsessive Love : A Novel , page 110,

She caught my eye, and called out, “Just showing off the studio. Keep the turps flowing.”

* on the turps

(wikipedia undefined) (-)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

The result of division by zero is undefined .

* defined