Green’s Dictionary of Slang

smart adj.

SE in slang uses

In compounds

smart aleck

see separate entries.

smart-arse/-arsed

see separate entries.

smart-ass

see under smart-arse.

smart bucks (n.) (also smart dollar) [buck n.3 (4)]

[1950s] (US Und.) money gained through crime.

smart eye (v.)

[2000s] (US) to stare in a challenging manner.

smart fart (n.) [fart n. (2)]

[1960s+] (Aus./N.Z.) one who considers themselves clever.

smart guy (n.) (also smart gee)

a knowledgable individual, or one who believes themselves to be.

smart mouth

see separate entries.

smart play (n.)

[1960s] (US teen) a good-looking, popular individual.

smart stuff (n.)

1. [1940s] (US teen) a show-off.

2. [1940s–50s] (US black) deceitful, underhand activity.

In phrases

book smart (adj.)

[1980s+] (US campus) academically high-flying, but low on common sense and social skills; also as n., one who reads and studies.

half-smart (adj.)

[1920s+] (US) stupid or reckless.

smart as… (adj.)

see separate entry.

smarted up (adj.)

(US) informed, aware.

smart off (v.)

[1960s+] (US black) to cheek, to ‘backtalk’.

smart someone up (v.) (also smarten, smarten up)

[1920s–60s] (US) to pass over information, to explain.

street smart (adj.)

see separate entry.