extravagant

Exceeding the bounds of something; roving; hence, foreign.

The extravagant and erring spirit hies / To his confine.

Extreme; wild; excessive; unrestrained.

extravagant acts, praise, or abuse

There appears something nobly wild and extravagant in great natural geniuses.

Exorbitant

According to this saga of intellectual-property misanthropy, these creatures [patent trolls] roam the business world, buying up patents and then using them to demand extravagant payouts from companies they accuse of infringing them. Often, their victims pay up rather than face the costs of a legal battle.

Profuse in expenditure; prodigal; wasteful.

an extravagant man

extravagant expense