Today's grid presented four shaded rows replete with words that refer to the human nether region, or in other words, a BOTTOMROW. I was thinking of trying to insert some theme-related words of my own into the review - as is my wont - but Mr. Trudeau managed to wedge in so many that all that remained was junk in the trunk. Of the ten theme answers in the grid, my favorite is CABOOSE, but I can be also be entertained by many of the others including RUMP, FANNY, and BEHIND. BUTT is good, but it's too bad a full 'buttock' couldn't be squeezed in.
I did get stuck in a couple of places. At 5A: "Not keep a secret," I entered 'tell' instead of BLAB. Also, I looked at 13D: "Shaggy beasts of 53-Across" before having gotten to 53-Across. I had the Y in BOOTY, which made me think I had discovered 'Yeti.' That turned out to be an abominable mistake that cost me some time.
There was a pile of fun fill including ABSCOND, FOB, and ZESTY. One clue that cleft me smiling was "Horse's disapproving vote?" (NEIGH). That cracked me up!
Just to clear the poop deck, I thought UNIDEAL was just that. There were also runs of partials and acronyms throughout the grid like OLA, SEZ, XES, PSS, ALII, and WEA that felt a little uncomfortable, but overall, it was fundamentally a fine puzzle. :)