Euphemistic slang, literally 'white turbid fluid'. Used informally, often in sexual contexts or online, to refer to semen.
I saw the word 'hakudakueki' on an online forum.
彼は冗談で「白濁液」と言ったが、周りは引いていた。
He jokingly said 'hakudakueki', but everyone around him was put off.
Compound of 白濁 (hakudaku, 'white turbidity') and 液 (eki, 'fluid'). The term is a descriptive euphemism for semen, likely coined in informal or online communities.