For pronunciation and definitions of <span class="searchmatch">ガタ落ち</span> – see the following entry. (This term, <span class="searchmatch">ガタ落ち</span>, is an alternative spelling of the above term.)...
【がた落ち】 [noun] sharp drop; plunge; nosedive; slump; (value or amount) plummeting [verb] (value or amount) to plummet Alternative spelling <span class="searchmatch">ガタ落ち</span>...