Immetrical 

Something that is made of both Imperial and Metric parts. These (usually old vehicles) can be difficult to work on, because to do the job properly at least 2 sets of the same tools are needed.

Gary: Can you pass me that weird spanner again?
Steve: The 13/16? Yeah ok...
Gary: Immetrical landrover crap

Immetrical by mongoosander May 28, 2010

Imperical Assload 

That to which two metric fucktonnes are equal.

I have three metric fucktonnes' worth of iron, or rather, 1.5 imperical assloads.

Imperical Assload by AvidElephant55 August 26, 2009

Imperical

Descriptor similar to tubular or righteous, generally used in approval, derived from a mix-up between empirical and imperial

That was a totally imperical kickflip!

Imperical by WiiTripper December 22, 2023