noun. The peculiar, testicular quality that some call guts and others call male-pattern batshit-loonosity.
Related terms: testicularity, testicular fortitude.
Real citation: "take your testicularitiness to www.thesteelheadsite.com this issue has been discussed there.....john"
(asadi, Nov. 9, 1999, http://groups-beta.google.com/group/
Made-up citation: "Before you can say 'testicularitiness,' my sister will kick you in the nuts."