Pre-baggin Grease Share definition Flag Grease, obtained from the fat under a walrus' scrotum. Used commonly when Baggin. I'm gonna go buy some pre-baggin grease for tomorow.Put the pre-baggin grease on it. Pre-baggin Grease by Walrus hunter August 5, 2012 0 0 Get merch Get the Pre-baggin Grease mug. Buy Now — $32.95 See more merch