The story
The number 20 is written XX in Roman numerals; this resembles two of the sawbucks used for cutting wood.
Etymology from Wiktionary, CC BY-SA 4.0.
double sawbuck
Today it means: Twenty dollars; a twenty-dollar bill. Full definition →
Today it means: Twenty dollars; a twenty-dollar bill. Full definition →
The number 20 is written XX in Roman numerals; this resembles two of the sawbucks used for cutting wood.
Etymology from Wiktionary, CC BY-SA 4.0.