Completely NSFW, but I worked at a company where we frequently needed to measure distance in approximate meters. I don't know the full origin, but at some point

Completely NSFW, but I worked at a company where we frequently needed to measure distance in approximate meters. I don't know the full origin, but at some point, after a night of drinking, one of the managers discovered that an elephant penis was approximately one meter. From then on, any estimated distance was done in EDs.