A version of 'You Tube' dedicated purely to porn.
" I gotta go now, I'm gonna go and shoot my load over a video from Red Tube "
by Tommy Lah October 28, 2007
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Where you convince your friends that you're taking the laptop to bed so you can watch 'Family Guy'. In reality you logon to Redtube and give yourself a treat.
Stephen & Liam - "Looks like Ads is off Red-tubing again".
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Guy 1: Have you seen the new show on YouTube Red?
Guy 2: Can’t, I don’t have any money
Guy 1: Oh, just get Red Tube then, it’s free
by Your Uncle Marvin November 25, 2019
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When engaged in anal sex, you pull out very quickly causing her rectum to invert, creating the "red tube sock."
by Barkley Jones December 5, 2013
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A sterile, plastic tube with a red lid similar in nature to those marketed by Falcon but from a (much) cheaper manufacturer.
PhD student 1: We're out of red lid tubes.
PhD student 2: Oh you balloon! You didn't order any.

Technician: Shall I order some red lid tubes?
PhD student: Yes. Bail on.
by UrbanBiochemist October 31, 2011
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