What does «cebollino» mean in Spanish?

Onion seed.
Common name for the plants Asphodelus fistulosus (gamoncillo or Varica de San José) and Asphodelus ramosus (asphodelus or gamón ramificado), also known as onions.
Common name for a bulbous edible plant with a flavor similar to onion, but smaller in size. It is also known as leaf onion, chives, xonacatl (southern Mexico), chives, chives, garlic chives or onion sticks (Venezuela). Scientific name: Allium schoenoprasum
Common name for the plant Globularia alypum, a flowering plant of the family Plantaginaceae, native to the Mediterranean coasts. It was used as a purgative in ancient times, today it is considered toxic.
Foolish, foolish.
(enviar a uno a escardar cebollinos) Send someone for a ride.
(escardar cebollinos) Doing nothing useful.