term:

Pour Over

pour over vi

: to be conveyed from an estate or trust to another trust
;broadly
: to be transferred as a residue or surplus [the remainder of the estate will pour over to a charitable trust]
vt
: to cause to be conveyed esp. to a pour-over trust

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.