"Hast a looksee" is a colloquial expression which means to take a quick look or glance at something. There are several other synonyms which can be used in place of this phrase. For instance, you could use "take a peek", "have a glance", "check it out", "inspect", "peer" or "observe". All of these synonyms convey the same meaning and are commonly used in informal settings. It's important to note that the choice of synonym depends on the context in which they are used. Overall, there are several ways to express the same meaning as "hast a looksee", so choose the synonym that works best for your situation.