A phrase commonly said by underage males after they have intercourse for he first time and are told that their penis was of small size
Person 1:When I Grow Up
Person 2:Dude Shut Up You Just Have A Small Dick
a meme where a funny and slightly unsettling image(commonly an image of a dog) is used with top text and bottom text saying "when the" in meme font.
Bob: Me when the
Jim: When what?
Bob: When the
When you do somthing as when you did it.
Boy: Im gonna right a book
Girl: when will you do it?
Boy: when i when
When one does something really bad they will regret later (unless they have no conscience at all).
I knew a guy who planned a school shooting cuz he got upset over a rumor of him and a girl. Turns out he was joking though he got a felon and it was all over the news. That guy is an example of When you F up.