Lenz, coked, monologues at Green — "and Lenz utilized akido to break…"
and Lenz utilized akido to break the man’s nose with one blow and then drive the bone’s shards and fragments up into the vendor’s brain with the follow-up heel of his hand, a maneuver known by a secret ancient Chinese term meaning The Old One-Two, eliminating the saliva guy’s map on the spot
Context
Lenz, secretly coked to the gills on the walk home with Green, spinning the tall tale of the pushy saliva-substitute vendor he claims to have killed with his beyond-black belt in "akido" [sic, his register]. The eliminate-the-map idiom as pure braggadocio: a fantasy killing narrated in the same street dialect the book uses for real ones, by the one character who's actually out demapping living things nightly.