This icon represents the right bumper button on an Xbox controller. It is a pentagonal shape with unequal sides and RB written in the center.
This Xbox Rb icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.