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arm-waving1
noun
1The action of waving or gesturing with the arms; an instance of this.
2The use of insubstantial, unsupported, or sensational arguments or claims, especially in scientific discourse; an instance of this.
Origin
Mid 19th century. From arm + waving.
arm-waving2
adjective
1That waves or gestures with the arms; characterized by such gestures.
2Using or involving insubstantial, unsupported, or sensational arguments or claims, especially in scientific discourse.
Origin
Late 19th century. From arm + waving.
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