say it: OH-vur-doo
overdo is a verb meaning "do something to an excessive degree". It carries one recorded sense.
do something to an excessive degree
“He overdid it last night when he did 100 pushups”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for overdo come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.