In baseball, a batter who hits home runs, or more generally, a person or athlete known for hitting home runs.
From 'dome' (home, slang) + '-er' (agent suffix). Baseball slang that emerged in the 20th century.
Baseball slang is a treasure trove of creative language—'domer' shows how sports fans compress meaning: instead of 'someone who hits home runs,' they created one catchy word that instantly communicates power and skill.
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