Green’s Dictionary of Slang

1. to beat severely, to ‘flatten’.

1832

Satirist (London) 21 Oct. 338/3: Mr. P. said that if he had come home and caught Mr. Brown, with his wife [...] he would have ‘Macadamised’ the parties.

2. (UK Und.) to walk the streets as a prostitute.

1846

Swell’s Night Guide 68: She vent macadamizing again, and then she chummed vith a gonniff, and they took a crib and did the fence and bawdykin dodge.