knock yourself out

please begin doing it If you want to make hotel and airline and car reservations and take care of everything, well, then, knock yourself out.

Usage notes: usually said to show you are unhappy with someone who has complained about your efforts

Name	Pronounced	Usage
Jurgen	-	Dutch
Shipley	['ʃipli]
Mele	-	Hawaiian
Sead	-	Bosnian
Denis	['denis]
Erik	E-rik (Swedish, Norwegian, Danish, German), E-reek (Finnish), AY-rik (Dutch), ER-ik (English)	Swedish, Norwegian, Danish, Finnish, Czech, Slovak, Slovene, Croatian, Hungarian, German, Dutch, Eng