boomslangPronunciation: /ˈbuːmslaŋ/Definition of boomslang noun a large, highly venomous southern African tree snake, the male of which is bright green and the female dull olive brown. Dispholidus typus, family Colubridae Origin: late 18th century: from Afrikaans, from Dutch boom 'tree' + slang 'snake'boomslang in other Oxford dictionaries Definition of boomslang in the US English dictionary