Wiktionary
white out
vb. (context transitive English) To hide an error or other material on a surface by covering it with correcting fluid.
Wikipedia
White Out (band)
White Out is a two piece experimental music group from New York that formed in winter 1995, whose aim is to create "an incendiary new music". The bands core members are Tom Surgal and Lin Culbertson, but they often work with other musicians, most notably renowned producer/musician/filmmaker Jim O'Rourke on two albums.
White Out (Once Upon a Time)
"White Out" is the second episode of the fourth season of the American fantasy drama series Once Upon a Time, which aired on October 5, 2014.
In this episode David Nolan, Captain Hook, and Elsa try to save Emma Swan's life, while flashbacks show David's past with Anna.