1. [mid-19C+] (US, mainly teen) a general term of approval, clever, sharp; thus slickness n.
2. [1970s] (US campus) attractive (of either gender).
[1970s] smooth, sophisticated, smart.
[1990s+] (US black) a confidence trickster, a cheat, a liar.
[1940s+] (US black) a smart, attractive young woman.
[1900s–10s] (US) an unprincipled individual.
[1990s+] cunning, self-promoting, ‘smooth’.
[1900s–10s] (US) a cunning, sly person.
[1990s+] (US prison) innocent of a crime; too clever to get caught, even though guilty.
[1960s+] (gay) to rub one’s penis against the thigh of one’s sexual partner; thus slick-legging n.
see slick n.1 (3)
[1950s+] (orig. US black) any clever stratagem that gets one what is desired.
[1950s–60s] (US) stupid or reckless.
1. [mid-19C+] (US) very smooth(ly), very slick(ly) .
2. [1910s] (US) attractive, good.