Green’s Dictionary of Slang

blinger n.

[SE blink or echoic bling, used for something that hits one with a sudden thump]

(US) the extreme example of a type or situation.

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[US]Reader’s Digest Dec. 18/1: 241 [people] caught one or more colds [...] One hundred seventy-nine of them developed real blingers going through to the phase of secondary infection [DARE].
, [US]Wentworth & Flexner DAS.