on the lash en · ADP
Etymology
Compare lash back, pre-lash.
Meanings
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(UK, slang) Out drinking socially; usually involving heavy alcohol consumption.
There's endless coverage of drunken "ladettes" out on the lash, young girls being sick into gutters, lying in streets, smoking, getting pregnant, looking gormless, telling people with research clipboards that "all they wanna be is famous, innit".
2011 January 9, Barbara Ellen, “Too many of us treat young white women as trash”, in The Observer: