1
general::
1. Burden or clutter up, as in Jane crapped up the garden with plastic pink flamingos. [c. 1946] 2. Ruin or foul up, as in I've really crapped up this speech; can I just start over again? This idiom employs crap in the sense of "defecate." [Vulgar slang; c. 1950]
American Heritage Idioms