The phrase "white beard" refers to a full, white beard that is typically associated with older men or those who have reached an advanced age. Full definition
18 years sober, I believe in the power of the universe, but not some dude with a long white beard, floating on a cloud in a golden chair. (religion.blogs.cnn.com)
I saw an elderly homeless man with a full white beard laying on the ground with his head hanging down. (familyadventuresummit.com)
There he was, with his full white beard, big belly, rosy cheeks, even small square wire - framed glasses. (articles.chicagotribune.com)