LEGO Yellow Minifigure Head with Frowning Smirk Expression and Brown Cheek Lines (Recessed Solid Stud) (15031 / 93583)

LEGO Yellow Minifigure Head with Frowning Smirk Expression and Brown Cheek Lines (Recessed Solid Stud) has been used in at least 19 LEGO sets over the past 13 years, since it was first used in 2011. You can also find this part in at least 2 other colors. It has the design IDs 15031, 93583, 95493 which can usually be found molded into the bottom of the part.