Green’s Dictionary of Slang

1. to inject narcotics; usu. as jacked (up) adj.; thus jacking up n.

1980		S. McConville ‘Prison Language’ in Michaels & Ricks (1980) 526: Injection may be described as [...] jacking up.
1986		B. Geldof Is That It? 70: If he jacked himself up in the house, I’d kick him out. Heroin horrified me.
1998		J. Hoskison Inside 44: I was jackin’ up when the cosser bastards burst in.
2000		N. Griffiths Grits 12: None uv em [i.e. injection scars] look fresh, which is good, unless uv course ee’s jackin up somewhir else these days.
2010		Sun. Times 19 Dec. 21/3: Don’t worry too much when they jack up in front of the vicar.

2. in non-drug contexts, e.g. drinking coffee.

2004		J. Ellroy ‘Jungletown Jihad’ in Destination: Morgue! (2004) 344: I hit a mocha mecca [...] I jacked up some java.
2013		K. Shea ‘Having Chiqui’ in ThugLit July-Aug. [ebook] With time in flux, he could reassemble his Beretta, jack the clip, and have a round chambered.