He advised him to stock up on food and rubber boots for the knee-deep mud trails.
My favorite threat is that I will be thrown in the River Miljacka, which is at most knee-deep, with my feet bound in cement.
Suddenly we are knee-deep in full length-biographies of President Eisenhower.
Emanuel was knee-deep in a higher priority Monday, an ongoing teachers strike.
He struggled forward breast-deep, waist-deep, knee-deep, in the black water.
At some points the water was knee-deep, at others it was chin-deep.
The Yankees wouldn't let up even if they crowded us clear back until we're knee-deep in the Rio Grande.
Now he was knee-deep in the reeds of the north shore; now he was climbing the bank.
Out in the meadow the horses were knee-deep in grass that waved in the morning breeze.
Here all was found as they had left it, save that the entrance was knee-deep in pumice-dust.
Overwhelmed; oversupplied; very much involved; UP TO one's ASS IN something: I never even tried to make money, and now I'm knee deep in the stuff (1940s+)