t-dick

Etymology tree
Latin testislbor.
English test(is)
Ancient Greek -ο- (-o-)der.
Latin -o-bor.
English -o-
Proto-Indo-European *ǵʰelh₃-
Proto-Hellenic *kʰolā́
Ancient Greek χολή (kholḗ)
Proto-Indo-European *ster-der.
Ancient Greek στερεός (stereós)
French cholestérine
French cholestérolbor.
English cholesterol
English sterol
German Ketonbor.
English ketone
English -one
English -sterone
English testosteroneclip.
English T
Proto-Indo-European *h₃reǵ-
Proto-Indo-European *-s
Proto-Indo-European *h₃rḗǵs
Proto-Celtic *rīxsbor.
Proto-Germanic *rīks
Proto-West Germanic *rīk
Proto-Indo-European *kret-der.?
Proto-Germanic *harduz
Proto-Germanic *-jaz
Proto-West Germanic *-ī
Proto-West Germanic *hardu
Proto-West Germanic *Rīkuhardu
Old High German Rihhart
Middle High German Rihardbor.
Medieval Latin Richardusder.
Old French Richardbor.
Middle English Rycharde
English Richardder.
English Rickder.
English Dickder.
English dick
English t-dick
From T (“testosterone”) + dick (“penis”). Alternatively, from t- (“trans”) + dick.