Definition of overspeak in English:

overspeak

Pronunciation /ˌəʊvəˈspiːk/

verb

US
  • 1To overstate or exaggerate; to make exaggerated claims for.

  • 2To speak too strongly, to exaggerate; to speak too much. Also with object (reflexive).

Origin

Early 17th century; earliest use found in Thomas Coryate (?1577–1617), traveller and writer. From over- + speak.