noun. Ned Flanders calls it the ba-donk-a-diddly-donk. I just call it the bippy, as my proud ancestors have done since Christ was a crawfish.
Real citation: "And Homer Simpson calls it a ba-donk-a-ma-donk."
(Ben Zimmer, Dec. 5, 2008, Visual Thesaurus, http://www.visualthesaurus.com/cm/evasive/1623/)
Made-up citation: "As an old boxing proverb puts it, 'You gotta give ba-donk-a-ma-donk to get ba-donk-a-ma-donk.' Or you can just punch people hard in the face. That works too."