cuñado

Etymology
From, from. Cf. also.

Noun

 * 1) brother-in-law

Etymology 1
, from. Doublet of the semi-learned borrowing. The "know-all" sense alludes to the stereotypical behavior of brothers-in-law at Christmas celebrations, weddings and family gatherings.

Noun

 * 1) brother-in-law
 * 2)  know-all,  blowhard