blankety-blank

[blang-ki-tee-blangk] /ˈblæŋ kɪ tiˈblæŋk/
adjective, adverb, Informal.
1.
damned; darned (used to imply an omission of an unprintable or unspeakable word):
The blankety-blank motor stalled again.
Origin
1885-90; after the practice of leaving blank spaces to represent profanity, as G-- d—- for God damn
Slang definitions & phrases for blankety-blank

blankety-blank

adj,n,v

A generalized euphemism substituted for a taboo or vulgar term; bleep, bleeping: You blankety-blank idiot!/ Stick it up your blankety-blank (1880s+)