A phrase originally used in the late '60s and early '70s in support of the hippie movement against the older generation'
s often
prude and narrowminded world view, which associated long
hair (especially on males) with a sloppy lifestyle. Sometimes also related to long
hair on males being associated with homosexuality due to the similarity with traditionally feminine hairstyles. The phrase emphasizes that the speaker isn'
t affected by what is meant as an insult but actually embraces the accusation.