wcwのようなどんな単語でも探してください。
 
1.
The parents of your live-in boyfriend/girlfriend.
I am having my sinlaws over for dinner...I hope I make a good impression since I have been shacking up with their son for a few weeks now and they are not down with the fact we are living in sin.
PunTiffによって 2008年08月01日(金)

Words related to sinlaws

boyfriend girlfriend inlaws parents shacking up
 
2.
The parent of a partner in a romantic and cohabitating but unmarried relationship.
Sadly, John's sin-laws dropped by the house for Jane's birthday.
Jim Dempseyによって 2004年08月28日(土)