Cold crashing is nothing more than lowering the temperature of the beer, after fermentation is complete, to somewhere below 40F but above freezing.
It aids in the settling of yeast and proteins (cold stabilization to prevent chill haze).
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger