A transmission with a low gear (granny gear), usually used on trucks and other towing vehicles, to make it easy to take off on a hill with a heavy load.
Man, your nan has a big bulge! does she use a cushion for her fanny pad? No, she has no fanny, she's a granny-tranny!
By Marthe
Your Granny Tranny
The most devastating insult known to mankind. Easily repels all insults, including "your mom gay" and "your dad lesbian" and will absolutely decimate your opponent's pride as well as their will to live. Due to its destructive nature, it should only be used in grave situations.