yellow card

US /ˈjel.oʊ ˌkɑːrd/
UK /ˈjel.oʊ ˌkɑːrd/
"yellow card" picture
1.

cartellino giallo

a card shown by the referee to a player who has committed a foul, indicating a caution

:
The referee gave him a yellow card for a reckless tackle.
L'arbitro gli ha dato un cartellino giallo per un tackle imprudente.
He received two yellow cards and was sent off the field.
Ha ricevuto due cartellini gialli ed è stato espulso dal campo.