Green’s Dictionary of Slang

1. (drugs) possessing drugs, as in question are you anywhere?

1946		Mezzrow & Wolfe Really the Blues 216: Hey there Poppa Mezz, is you anywhere?
1953		‘William Lee’ Junkie (1966) 155: For example ‘Are you anywhere?’ can mean ‘Do you have any junk or weed on your person?’.
1969		R.R. Lingeman Drugs from A to Z (1970) 33: anywhere Possessing drugs, as in ‘are you anywhere?’, meaning ‘do you have any drugs?’.
2001		ONDCP Street Terms 2: Are you anywhere? — Do you use marijuana?

2. psychologically secure.

1944		D. Burley Orig. Hbk of Harlem Jive 60: You ain’t nowhere without your proper Square.
1953		‘William Lee’ Junkie (1966) 155: Jive talk always refers to more than one level of fact. ‘Are you anywhere?’ can also refer to your psychic condition: ‘Are you holding psychically?’.
1964		B. Jackson Get Your Ass in the Water (1974) 97: Don’t front me with that shit because it’s not anywhere, / and this is Joe the Grinder and damn that square.