The title "Tenjho Tenge" is part of the full phrase "Tenjo Tenge yui ga doku son" which is translated to read: "There is no equal to me in this entire world." (i.e. below the heaven and on this earth).
The phrase is attributed to the Buddha Sakyamuni, who said this whilst taking seven steps immediately after being born, supposed to assert his unparalleled status. This relates to the mystical martial arts some fighters in the show possess.
Maya and Aya Natsume, Masataka Takayanagi, Bob Makihara and Souchiro Nagi pop out of manga pages and land on the series title.