look up any word, like cunt:
 
1.
Derived from ridiculous it means something ridiculously good, really classy and sophisticated, or freaking awesome.

Must be used in a positive tense.

Invented serendipitously during office communicator correspondence.
The maserati gt is sediculous.

That chick is sediculous.
by yalah January 16, 2011
1 3