lego math 

Shoddy or obviously inaccurate math.

In response to someone using Lego math by saying something like, "I worked for 5 hours and I got 60 bucks! I must have been getting payed like $18 an hour!"

"Dude that is some serious Lego math..."
"What are you using, Lego math?"

lego math by A Fern June 28, 2007