- an aircraftsman of the lowest rank in the Royal Air Force.
- a worthless, stupid person; jerk.
Origin of erk
First recorded in 1920–25; earlier naval slang for any noncommissioned rank; of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- British slang an aircraftman or naval rating
C20: perhaps a corruption of AC (aircraftman)