flaccid
adjective /ˈflæsɪd/
/ˈflæsɪd/
(formal)- soft and weak; not hard
- flaccid breasts
Oxford Collocations DictionaryFlaccid is used with these nouns:- penis
Word Originearly 17th cent.: from French flaccide or Latin flaccidus, from flaccus ‘flabby’.