bootin'er Share definition Flag New Brunswick, Canada Slang 1. In a rush. 2. Could be used to replace going. 1. Holy fuck, she was bootin'er! 2. How’s she bootin'er? bootin'er by CYNSIN December 9, 2008 0 0 Get merch Get the bootin'er mug. Buy Now — $32.95 See more merch