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2.
An expression of (long) distance or time
"Aww man, I'm not walking there, it's such a lennard"

or

"I can't wait til Christmas but it's a proper lennard away"
by Cabbage Patch McFlange-alot October 04, 2007
 
1.
a math teacher who thinks he knows it all.
oh my god that guy is such a lennard
by pebbles31 May 10, 2005