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"Shut up, Leonard!"
First occurred: "Advanced Criminal Law" — Participants: Leonard, members of the study group.
Type of theme: Running gags: a joke or a comical reference that appears repeatedly throughout the show

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Throughout the series, Leonard has run-ins with different study group members that usually lead to an exchange of insults. The format is that Leonard barges in on a conversation with an insult or irrelevant information and then somebody retorts with a cutting remark. It originally involved only Leonard and Jeff but Shirley and Britta have each gotten a "Shut up, Leonard!". Even Dean Pelton said once. This running gag's first occurrence was in the Season One episode "Advanced Criminal Law".


Oh, come on Leonard. If you're going to argue with me, put on a bathing suit.

–Jeff, Advanced Criminal Law

Shut up, Leonard! Nobody even knows what you're talking about!

–Jeff, Romantic Expressionism

Shut up, Leonard! I talked to your son on Family Day. I know all about your gambling.

–Jeff, Physical Education

Shut up, Leonard! I heard about your prescription socks.

–Jeff, Biology 101

Shut up, Leonard! You smell like mentholyptus. What are you even doing here?

–Jeff, Documentary Filmmaking: Redux

Shut up, Leonard! I found your YouTube page. What's the point in reviewing frozen pizza?

–Shirley, Foosball and Nocturnal Vigilantism

Shut up, Leonard! Those teenage girls you play ping pong with are doing it ironically.

–Jeff, Urban Matrimony and the Sandwich Arts

Shut up, Leonard! I know about your crooked wang.

–Britta, Introduction to Finality

The running gag is also subverted once when Jeff is under the influence of anti-anxiety medication:

Looking good, Winger.


Thank you, Leonard. For that compliment, and for your service to this country.


Shut up, Leonard! I got a picture of your old nose, it was a lateral move!

–Dean Pelton, Basic Human Anatomy

I told you you'd be back.

– Leonard , "Repilot"

Shut up, Leonard! I'm not here! I'm just a figment of your creeping dementia!

–Jeff, "Repilot"

Shut up, Leonard! I once mistook six people for you at a pharmacy!

–Britta, "Ladders"

Shut up, Leonard! You are, you are, old! And ... you deserve less because of your age.

–Frankie, "Ladders"

Shut up, Leonard! You look like a German puppet maker and smell like the inside of a church!

–Father, "Emotional Consequences of Broadcast Television"

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