"Grabs some z'" is a colloquial expression used to refer to the act of sleeping or taking a nap. There are several other synonyms that can be used to convey the same meaning, such as "catching some shut-eye," "getting some rest," "taking a quick snooze," "dozing off," "nodding off," "slumbering," "catnapping," and "power napping." Each of these synonyms has its own connotation and level of formality, but they all express the idea of taking a short period of rest or sleep. Whether you're a busy professional, a student, or someone who just needs a few moments of respite, there are plenty of ways to say "grabs some z'".
