When one makes plans to meet up with (or go out with) a female and she shows up with a guy.

A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.

When you are getting a "girl" to send you naked pics online and you get them and then realize its a dude sending you pics from google images.

They typically say that their cam is broken or it is at their other parents house to avoiding giving away that they are actually dudes.

past tense; the act of duding someone, a friendly term. created by a socially inadequate aimbot.

The act in which a player in the world of final fantasy marrys a girl in game, only to find out that it is a guy irl

Cool girl. Come from dude....

When you’ve been given solid advice from a trusted dude