Idiomatic expression consisting of <span class="searchmatch">首</span> (kubi, “neck”) + <span class="searchmatch">を</span> (wo) + <span class="searchmatch">洗</span><span class="searchmatch">って</span> (aratte, “-te form of <span class="searchmatch">洗</span>(あら)う (arau, “to wash”)”) + <span class="searchmatch">待つ</span> (matsu, “to wait”), literally "to...
【<span class="searchmatch">首</span><span class="searchmatch">を</span><span class="searchmatch">洗</span><span class="searchmatch">って</span><span class="searchmatch">待つ</span>】 [verb] (idiomatic) to wait for one's punishment, to wait and see...