Wiktionary
sinkful
n. As much as a sink will hold.
Usage examples of "sinkful".
She carried it, still writhing, to the sinkful of stagnant water and flipped it off the fork.
Lilly looked around at the mess he had left that morning—the sinkful of dishes.
I've gotta get rid of a sinkful of dirty dishes before the old gals get home and give me hell.