The original name was the "Joy Button", but that was too much for IBM.

So after pooh-pooh-ing the name "Joy Button", IBM finally settled on and trademarked the name "Trackpoint." But one concession they made, was when they published a two page ad spread in Time Magazine with a close-up of the Trackpoint, above the slogan "So hot, we had to make it red!"

Ted Selker also made a prototype Thinkpad with TWO hot red Trackpoints on the keyboard, which invitingly resembled a pair of nipples. It was very popular with everyone he tested it on, but unfortunately OS/2 had no idea how to cope with two pointing devices, so there wasn't much use for it, besides being a wonderful ice breaker at parties.

"Clit Mouse". It's old slang. Not the best, but the best way to get someone to realize what you're talking about.