This saying is originally from a rather obscure meme that includes Max and Ruby. At the end of the comic, Max exclaims "BEEP BEEP LETTUCE" in response to a question Ruby asks.

Essentially, Beep beep lettuce can be used as an interjection whenever one feels it's appropriate or just want to mess around with whoever they are with.
Person 1: Just grab me the Ragu from the stock room, ok Jimmy?


Person 1: ...
by serialspongedesecrator September 16, 2017
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Sounds like the japanese phrase "ビープビープレタス" which is pronounced be-pube-puretasu which sounds like beep beep lettuce. It means "your eyes are stars"
by Estrobe March 8, 2019
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the love of my life also can be altered to make beep beep communism.
guy 1: wheres all the food gone

guy 2: beep beep lettuce
by man wit da plan and a werd ta February 19, 2020
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Beep Beep Lettuce
Mike: Hey Jim. Jim: Beep Beep Lettuce
by TriTimes December 12, 2018
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Friend: Alright, beep beep lettuce!
Me: beep beep lettuce!
by hithereurbandiconary November 16, 2016
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