Rock up is British and Australian slang meaning to arrive, especially casually or without much planning: What time did you rock up?
The phrase suggests an informal, unhurried appearance—you rock up to a party, not to a job interview.
He just rocked up unannounced.
1. arrive — appear, Become perceptible to sight; roll in (Arrive, often slowly); drop in (Visit without notice); pop in (Brief unannounced visit); materialize · come · enter · attend · join · land · surface · emerge · check in
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rock, up, rocks, rocked, rocking, rocker, rocky, rockier, rockiest
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- Timeless · Everyday, not technical · Rated G