A newcomer or late arrival to a group or activity. The rest of the staff wasn't too fond of Greg, a Johnny-come-lately who received praise from the manager after just one week on the job. Hurry up, Johnny-come-lately, we've already started today's drills!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. someone new to a situation or status. This Johnnie-come-lately doesn’t know what it was like in the old days.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.