A "clean" version of calling someone incompetent or simpleminded. Most people do not realize that "sacklehorn" is an insult which makes the phrase that more enjoyable to use. (sa-ckl-horn)
Example: That guy is such a sacklehorn.
Example: There are a lot of sacklehorns in this area.
Example: Don't be a sacklehorn.
Example: There are a lot of sacklehorns in this area.
Example: Don't be a sacklehorn.
by LinguisticNinja April 29, 2016