Grabbed some z is a slang term for sleep or taking a nap. There are many synonyms that can be used instead of this phrase. Here are a few examples: caught some shut-eye, took a siesta, had a nap, dozed off, snoozed, slept, rested, caught some zzz's, got some shuteye, crashed out, and took a power nap. Using these different synonyms can add variety to your language and make your statements more interesting. Whether you are telling someone about a quick nap you took or describing someone else's sleep habits, there are many ways to convey the idea of "grabbed some z".