up to 90
Flat out, going mental with how much you've got on.
Definitions
Run off your feet, manic, going at full tilt. The 90 is mph on the old speedo — you're redlining. Usually said when you're snowed under and need everyone to know.
up to 90 In A Sentence
Origin & Usage
Hiberno-English idiom, motoring metaphor — 90 mph being flat-out on Irish roads back when speedos topped out there.
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