Go fly a plane into a mountain simply means kys as if you were to fly a plane into a mountain it would kill you
Go fly a plane into a mountain is used in a similar way as go play in traffic , go jump off a bridge, go drink bleach stick a fork in the electric socket, or new as of the year 2018 eat some Tide Pods sorry kids Tide Pods don't taste like candy they will just simply kill you
by ಠ_ರೃ 1997 February 25, 2018