rear end - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

rear end (plural rear ends)

1. The back or hindmost part of anything, such as a car.
2. (slang) The buttocks.

   • 2016 January 24, Les Chappell, “TV: Review: The Simpsons (Classic), “Natural Born Kissers” (season nine, episode 25, originally aired 05/17/1998)”, in The Onion AV Club‎^[1]:

     Sure, Homer and Marge being caught naked in front of the town is funny, but why not make it total humiliation? Why not have Homer dragged ass-first over a church’s glass ceiling and force the pastor to give praise to God’s floors? Why not have Homer’s rear end block a game-winning field goal?

• tail end

• Naderer, Rearden