Sub-swearwords

[I Don't Need A Name]

Frell (which originated on the incredibly awesome sci-fi show Farscape)

this is one smart person xD

Frell, along with Yotz (Sh**), Dren (Sh** again), Fekkik (Ars*), Son Of A Hazmot (no prizes for that one), Hezmana (Hell) and Tralk (whore) are obviously the coolest curses on earth xD