A response designed to point out, on an internet messageboard or similar, that a person (the target of the command) is unfamiliar with certain inside jokes (meme), has not been around very long, or is a generally inept poster who needs to contribute less to the conversation (lurk) until he/she is more informed.
1337n00b: Can someone explain why that guy is in so many photoshops? I mean, sure he looks funny, but...
What a gatekeepingasshole says on a message board such as Reddit to a new user who doesn't understand an inside joke.
User A: <Says inside joke and gets upvoted by other users who got the joke>
User B: What does <inside joke> mean?
User C: Lurk more peasant
User A: Fuck you prick
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.
When a manwill search for hours to find something that is laying out in the open on a table. Items are often easily found by a women.
Man: "I have been searching for hours for keys."
Woman: "You mean the ones sitting there on the coffee table?"
Man: "Where?"
Woman: "Right there in the middle of that table."
Man: "oh, must have been Male Pattern Blindness"