cocktail made from vodka or gin and orange juice, 1970, in full Harvey wallbanger. Probably so called from its effect on the locomotive skills of the consumer.
A dose or capsule of methaqualone; lude: called wall bangers by the kids (1950s+ Teenagers & narcotics)
(also Harvey Wallbanger) A drink made of vodka or gin and juice (late 1960s+)
[presumably fr the effect of the drug or potion on the consumer]