| Date: | 1800-1900 |
| Origin: | loggerhead 'stupid person, large head, type of heavy tool' (16-20 centuries), from logger 'block of wood' (16-18 centuries) (probably from LOG1) + head |
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log‧ger‧heads

be at loggerheads (with somebody)
be at loggerheads (with somebody) over
He is at loggerheads with many of his own party over the issue of taxation.
He is at loggerheads with many of his own party over the issue of taxation.