The story
From crunchy. Use to refer to infantrymen in Vietnam is from their "crunching" through the jungle brush. Use to refer to white Afrikaners is perhaps from their supposed tendency to eat crunchy food.
Etymology from Wiktionary, CC BY-SA 4.0.
crunchie
Today it means: A somewhat granola- or cookie-like chocolate-covered sweet, served in bar form. Full definition →