inch way along
inch (one's) way along (something)
To move across something in very small increments or very gradually. We all watched in awe as the man carefully inched his way along the tightrope.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
inch one's way along somethingand inch oneself along something
to creep slowly on or along something. I inched my way along the ledge and almost fell off. Sharon inched herself along the side of the bridge.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.