a newcomer; a new arrival; a person who is new to a situation or activity
usu. new kid in town, new kid on the block
Grumpy John McCain is back and telling the new kid to get off his lawn.
“Gluten sensitivity is the new kid on the block,” says Alice Bast, president of the National Foundation for Celiac Awareness.
Justin Bieber, Lady Gaga and new kid on the block, Iggy Azalea were discovered by Akon, Usher, and T.I., respectively.