有色無膽

1. • to be perverse and suggestive towards the opposite sex, but shrinking back when provoked to act on it
2. • to have perverted thoughts but no guts to actually do it
3. • to be all talk and no action

Character by character

• 有(yǒu)have
• 色(sè)color
• 無(wú)not to have
• 膽(dǎn)gall bladder