conga line

noun3

1. •
   A line of people dancing the conga.
2. •
   (figurative) A succession of similar events, especially a quick, unstoppable, and/or comical succession.

   • The politician's vainglorious boasting was quickly followed by a conga line of embarrassing defeats.
3. •
   (Canada, figurative) A moving formation of snowplows and/or similar equipment, arranged in a diagonal line across a multilane highway, airport runway, or other roadway, such that the snow from the first vehicle is passed to the second, and then from the second to third, and so on, thereby clearing much or all of the route's width in a single pass.

   • It was a pity, Mel Bakersfeld reflected, that runway snow teams were not on more public view. . . . Airport men called the group a Conga Line. — 1968