Green’s Dictionary of Slang

covered adj.

(US Und.) ‘protected’ from prosecution or arrest.

[US]‘Number 1500’ Life In Sing Sing 262: I’m well covered and strong as can be.
[US]W.R. Burnett Vanity Row 130: ‘So it’s robbery. You covering me, Hargis?’ ‘Sure,’ said Roy, then he stood up. [...] ‘ Okay, Hargis. Just so I’m covered.’ ‘You’re covered’.
[US]G. Radano Walking the Beat 79: ‘You got nothing to worry about, kid. Let them sue. Let them do anything they want. You’re covered: you did everything according to the book’.

SE in slang uses

In phrases

got you covered (also gotcha covered)

(US campus) an expression of support.

[US]W. White ‘Wayne University Sl.’ AS XXX:4 303: got you covered, v.phr. I understand.
[US] in Current Sl. (1967) I:4 4/1: Got you covered, interj. I understand.
[US]Eble Campus Sl. Apr.
[US]Eble Sl. and Sociability 101: Expressions of reassurance or support tend to be spatial: [...] gotcha covered, I’m there, we here.
have it covered (v.)

(orig. US black) to have a situation well under control.

[US]L. Durst Jives of Dr. Hepcat (1989) 2: Your pockets are loaded with ‘scratch’ and if the push comes right down to a shove you got everything covered.
[US]Down Beat 9 May 15: Oscar Brown Jr. really had those lyrics covered.
[US]E. Folb Runnin’ Down Some Lines 127: There are a number of vernacular expressions that characterize the state of being and staying cool [...] to have it covered.
[US]Simon & Burns Corner (1998) 302: ‘Scoogie’ll help,’ she offered. ‘I got it covered.’.
[UK]Observer Mag. 9 Apr. 14: He has it covered.