Wojak

A depiction of a generic Wojak. It is a simplistic black-and-white drawing of a bald man with a wistful expression.
Original, generic appearance of Wojak

Wojak (from Polish wojak [ˈvɔjak], loosely 'soldier' or 'fighter'), also known as Feels Guy, is an Internet meme that is, in its original form, a simple, black-outlined cartoon drawing of a bald man with a wistful expression.

The meme subsequently grew in popularity on 4chan, where the character became associated with the phrases formerly used by wojak such as "I know that feel, bro", "that feel" or "that feel when".