吸きゅう茎けいConjugationMeanings1noun, noun or participle which takes 'suru'fellatio; irrumationExplicit sexual term; used in adult contexts. Can be used as a noun or with する.彼かの女じょは彼かれに吸きゅう茎けいをした。She performed fellatio on him.そのAVでは吸きゅう茎けいシーンが多おおかった。That adult video had many fellatio scenes.