I recall a Poul Anderson passage, possibly in "The Avatar":

"Tonight we are going to get boiled as an owl, and high as a kite."

"I refer, of course, to the International Standard Owl after it has consumed 1 liter of 100 proof ethanol, and the International Standard Kite, flown in a 1 gravity field at STP."

(Not an exact quote.)

(STP = Standard Temperature and Pressure, a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 1 atm (101.325 kPa).)

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That strongman stick at the carnival, the one that challenges you to ring the bell for a prize.

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The "This High" bar at the carnival ride.

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Use your pinkie or your wiener as long as you never use metric.

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Smidgen
Scotche
Tad
Iota
Speck

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Dash
Pinch
Sprinkling
Glug

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Avoirdupois

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Cider House Ruler

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1/12th of a foot is a big toe.

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Rule of Thumb