If I ain't strapped that means I took em off my Nike Airs
Strapped — Carrying some kind of firearm.
However in this line strapped carries a double meaning. Strapped meaning he carries a gun, and his straps on his trainers are done up. If he isnt strapped, that only means his trainers are a little loose. Don’t get confused with this if you piss this guy off. Consequences may be fatal.
He’s also referencing the fact that high top Air Forces have removable straps.
To help improve the meaning of these lyrics, visit "Reservoir Dogs" by Jay Z (Ft. Beanie Sigel, The LOX & Sauce Money) Lyrics and leave a comment on the lyrics box