A Het is a Heterosexual person. Being Heterosexual is the quality or characteristic of being romantically, and sexually attracted to the opposite sex or gender. Heterosexual men are attracted to women, and heterosexual women are attracted to men. People who are Heterosexual are referred to as "straight".
Het or нет is the meme of when Joel from Vinesauce is playing a Russian Felix The Cat bootleg and stumbles upon the continue screen. he picks нет and then he sees Felix ripping his face off. The Term Het has been known as a meme.
Joel:Felix The- неt,неt, Het
*game over screen shows felix ripping face off*
Joel: WHAT? WHAT THE FUCK IS THAT?