To forge a pathway by walking on top of vegetation until it is permanently flattened or destroyed. The elephants have trampled out a path that they follow every single year. The kids have run back and forth between the two yards so frequently that they've trampled a little pathway out.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
trample something out
to create a pathway by marching or stamping the same trail over and over. The mail carriers have trampled a path out through my marigolds! Jim trampled out a path in my garden.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.