<span class="searchmatch">cùlaibh</span> <span class="searchmatch">air</span> <span class="searchmatch">a</span>' <span class="searchmatch">bheulaibh</span> back to front...
cùl-thaobh. <span class="searchmatch">cùlaibh</span> m (genitive singular <span class="searchmatch">cùlaibh</span>) back background (antonym(s) of “back”): beulaibh <span class="searchmatch">air</span> <span class="searchmatch">cùlaibh</span> (“behind”) bòrd-<span class="searchmatch">cùlaibh</span> (“port (side of <span class="searchmatch">a</span> vessel)”)...
beulaibh) front (side) (antonym(s) of “front”): <span class="searchmatch">cùlaibh</span> <span class="searchmatch">air</span> beulaibh (“in front of”) bòrd-beulaibh (“starboard”) <span class="searchmatch">cùlaibh</span> <span class="searchmatch">air</span> <span class="searchmatch">a</span>' <span class="searchmatch">bheulaibh</span> (“back to front”)...
so that the back is now at the front; the wrong way around. I was in such <span class="searchmatch">a</span> hurry that I put my underpants on back to front. (figuratively, by extension)...