Green’s Dictionary of Slang

lose v.

1. [mid-19C+] (US) to vomit; usu. in phrs. below.

2. [late 19C+] (US) to kill.

3. [late 19C+] (US) to evade.

4. [1920s+] (orig. US) to get rid of, to dispose of.

5. [1990s+] (US) of a CD, radio etc, to turn off.

In phrases

lose (a/one’s) dinner (v.)

[1950s+] (Aus./US) to vomit.

lose a meal (v.)

[mid-19C+] (Aus.) a genteel euph., to vomit.

lose one’s load (v.)

[1960s] (Aus.) to vomit.

lose (one’s) lunch (v.) (also drop one’s lunch, lose one’s breakfast, park one’s lunch, shoot one’s lunch)

1. [1920s+] (Aus./US) to vomit (cf. blow lunch under blow v.1 ).

2. to lose one’s temper.

SE in slang uses

In phrases

lose one’s...

see also under relevant n.

lose one’s gender (v.)

[1940s+] (gay) to abandon homosexuality to become a heterosexual.

lose one’s rudder (v.)

[18C] to be drunk and thus lose one’s sense of direction.

lose one’s stopper (v.)

[1940s] to lose one’s temper.

lose one’s Tampax (v.) (also lose one’s douche bag)

[1960s] (US) to become hysterical.

lose the match and pocket the stakes (v.) [the male is seen as the ‘winner’; the stakes are his ejaculated semen]

[19C] of a woman, to have sexual intercourse.

lose the number of one’s mess (v.) (also lose one’s number, settle the number of one’s mess) [naut. imagery]

1. [early 19C–1930s] (also get put out of mess) to die; thus keep the number of one’s mess, to avoid death.

2. [1910s] to lose one’s position; to fall from social or professional grace.

lose the run of (v.) [Irish ná bí ag rith leat féin mar sin, lit. ‘don’t be running with yourself like that’]

1. [1900s] (Aus.) to lose control of someone else.

2. [1970s+] (Irish) to lose one’s self-control.

In exclamations

go and lose yourself!

[20C+] (Aus.) a general excl. of dismissal or disdain.