Green’s Dictionary of Slang

stract adj.

[orig. synon. US milit. strac; note Dave Wilton (American Dialect Society List 10 Aug. 2002): ‘“STRAC.” Originally an 1950s acronym for Strategic Army Corps, a group of four elite divisions maintained at a high readiness for overseas deployment. It began to be used as an adjective, to be “STRAC” was to be prepared [...] After the demise of the Corps, the adjectival use hung on. A new, unofficial backronym was formed for it, “Skilled, Tough, Ready, Around the Clock.” It was very common in the US Army of the 1980s.’]

(US prison) neat and clean in appearance and dress.

[[US]Current Sl. VI 10: Strac trooper, n. A very military-looking soldier].
[[US]M. Baker Nam (1982) 41: The guys there, they boots is spit-shined, they had creases in they jungles [...] They were all Strak].
[US](con. 1998–2000) J. Lerner You Got Nothing Coming 128: You wanna look stract for the Disciplinary Committee. Appearances count a lot with the warden.