This icon represents party hat. It is a triangle with a small round circle at the top of it with four wavy lines going down the hat from side to side.
This is a Party Hat icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,700 icons, all in the same style and quality.