fla·gi·tious 
(flə-jĭshəs)
(flə-jĭshəs)adj.
1. Characterized by extremely brutal or cruel crimes; vicious.
2. Infamous; scandalous: "That remorseless government persisted in its flagitious project" (Robert Southey).
[Middle English flagicious, wicked, from Latin flāgitiōsus, from flāgitium, shameful act, protest, from flāgitāre, to importune, to demand vehemently.]
fla·gitious·ly adv.