som bara den

Etymology
Perhaps originally in the sense of "as only it [is/does/etc.]" and then taken as and generalized to a generic intensifier.

Adverb

 * 1)  extremely, crazy, (except not even slightly vulgar) as hell
 * 2)  with great intensity, like crazy
 * 1)  with great intensity, like crazy
 * 1)  with great intensity, like crazy