Green’s Dictionary of Slang

bash v.

[ext. of Sw. basa, to baste, whip, flog, lash, or Da. baske, to beat, strike, cudgel; but poss. onomat.]

1. [late 16C+] (also bash off) to hit, to batter (with the fist).

2. [mid–late 19C] (UK prison) to flog as a judicial punishment.

3. [1910s] (Aus.) to dismiss from employment.

4. [1910s+] to masturbate.

5. [1910s+] (Aus.) to expend all one’s money on drink.

6. [1930s+] to work as a prostitute.

7. [1960s+] (also bash it off) to have sexual intercourse.

8. [1970s+] (US) to berate, to criticize, to abuse; usu. as bashing n. (5)

In compounds

bash artist (n.) [-artist sfx]

a violent person, esp. a prison guard.

bash boy (n.)

1. (UK Und.) that member of a smash-and-grab gang who actually breaks the shop window.

2. [1980s] (US, West) a skinhead; thus female bashette.

In phrases

bashed out (adj.)

[1900s] (US) worn out.

bash into (v.)

[1920s+] to meet by chance.

bash it off (v.)

see sense 7 above.

bash off (v.)

see sense 1 above.

bash on (v.)

1. [1940s+] (orig. milit.) to persist, to keep making an effort.

2. to make a fuss.

bash out (v.) [1950s+]

1. to produce with only minimal care, esp. of writing.

2. to do, to perform.

bash the candle (v.)

[1990s+] to masturbate [SE candle as phallic image].

bash the living Moses out of (v.) (also give Moses)

[mid-19C+] to beat severely.

bash the spine (v.)

[1940s+] (Aus.) to idle, to waste time, to loaf around.

bash up (v.)

1. [1940s–50s] (mainly juv.) to beat up, to thrash; thus bash-up n., a beating.

2. [1940s–60s] (N.Z.) to make.

3. [1960s] to hurt.

on the bash

1. [1910s+] (Aus./N.Z.) drinking, usu. to excess.

2. [1930s+] working the streets as a prostitute.

3. [1940s] (UK Und.) fighting, esp. between gangs.

4. [1960s+] having sexual intercourse.

In exclamations

bash it up you!

[1920s+] (Aus.) go away! leave me in peace!