What is that hairdo called when a man's hair is smooth back using gel?

The hairstyle where a man's hair is slicked back using gel is commonly referred to as a "slicked-back" hairstyle. It often features short sides and longer hair on top, styled back for a polished and neat appearance. This look can be associated with classic styles, such as the "pompadour" or "greaser" styles, depending on the volume and length of the hair.