to be perverse and suggestive towards the opposite sex, but shrinking back when provoked to act on it; to have perverted thoughts but no guts to actually do it
Traditional 有色無膽
Meaning
yǒusèwúdǎnyou3 se4 wu2 dan3
to be perverse and suggestive towards the opposite sex, but shrinking back when provoked to act on it
to have perverted thoughts but no guts to actually do it