This time Drew seemed determined to deal Johnny at least one smacker on the face.
"money," c.1918, American English slang, perhaps from smack (v.1) on notion of something "smacked" into the palm of the hand. Extended form smackeroo is attested from 1939.
Heroin; horse, shit: The cocaine pulled from the front while the smack pushed from the back. It was an incredibly intense high
[1942+ Narcotics; fr Yiddish shmek, ''a smell, sniff''; an earlier sense was ''a small packet of drugs,'' hence merely a sniff or whiff]