twice as less

Etymology
+ +.

Adverb

 * 1)  Half as much.

Usage notes
In order for the term to make proper sense, the subject should have a quantity that is multiplicative (or at least additive). It is preferable, however, to use a positive expression for the quantity, such as in half as much or half as many.

It may be seen used colloquially when the quantity is not multiplicative, as a form of emphatic. For example: He is twice as less intelligent than his father. The 'positive' expression (in this case, half as) is still preferred.