Definitions by Pletchdog

grumble-gasp 

The sound made after realizing you just royally screwed something up. An "awww shit" vocalization with out using any real words. An exasperated inhale followed by moan/growl exhale.

When John made that wrong turn onto a one-way street you should have heard his grumble-gasp.

grumble-gasp by Pletchdog March 1, 2013