TragicWhiteKnight: Internally, I'm stuck with the prosaic descriptions of 'cock' and 'schlong'; the only reason I've ever ended up naming it was when I began talking about my size over the Internet and didn't want to repeat the same word a gazllion times in each sentence.
My nomenclature strategy [the classiest way I can think to say it] is to think of an obscure category, then pilfer some of the first examples you think of, making only slight changes:
Examples:
* 1940s song-titles: "The Chattenooga Choo-Choo", "The Boogie-Woogie Bugle Boy..."
* Independent movies: "My Own Private Idaho", "My Beautiful Longness"
* Failed US TV shows: "Supertrain", "Manimal", "Hammerman."
'Course, I remember back when we called it by its real name: 'the Heather Graham detector' - ah, good times, good times...