notadictionary.com
女が男に効くと思ってるけど効かない悪口
→ “Insults that a woman thinks will work on a man, but actually don't.”
女 onna = woman (noun)
が ga = subject marker particle
男 otoko = man (noun)
に ni = to / towards (particle indicating target/direction)
効く kiku = to work / to be effective (verb)
と to = quote particle (introducing thought/speech)
思ってる omotteru = thinking (colloquial contraction of 'omotte iru')
思 omo = think
っ = geminate consonant (sound lengthener)
てる teru = progressive aspect (colloquial for 'te iru')
けど kedo = but / however (conjunction)
効かない kikanai = doesn't work / ineffective (negative form of 'kiku')
悪口 waruguchi = insult / badmouthing (noun)
悪 aku = bad / evil
口 kuchi = mouth