What does sucking cement?

"Sucking cement" is likely a colloquial or slang phrase, and its meaning can vary depending on context. In some cases, it may refer to a negative or challenging situation, often implying that someone is enduring something unpleasant or difficult. It's important to consider the context in which the phrase is used for a more accurate interpretation. If you have a specific context in mind, please provide it for a more tailored response.