Wonderfully, thick, round and pouty nipples on the female breasts. Coined Sirloin Nips due to their meaty similarity to delicious sirloin tips.
Stan: Hey Joe. How as your date with Rachel? Did you get any of that sweet poon last night?
Joe: Yea brahhhhhh! She was one tight box. But the best part was those Sirloin Nips of hers.

Stan: Oh yea brooooohh. Love em' meaty.
by Eaton Holgoode August 20, 2015
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A fine example of a penis, usually a very long/thick one.
Well babe, that sure is some swinging sirloin ya got there.
by Karen Shelton August 30, 2007
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Corned Beef. Beloved of the inhabitants of South Wales who use it in anything they can to make their Giro go further, therefore being able to afford more booze and fags. Uses include stew (cawl), pies, pasties and hash. Particularly delicious as an antipasta, just before the main course of spaghetti alla corned beef.
'Oooh, Myfanwi, what you done for dinner you lazy slag?'
'Dai, look you boyo, I got a nice bit of steak from this tin, so it's valleys sirloin for you'
by Lingoooo September 7, 2007
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A really good type of meat-from a cow's leg.
"I had sirloin steak the other night for dinner...it was so good."
by purpledoodles February 6, 2010
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Slang and derogatory for beautiful bodacious labia
Her juicy sirloin curtains welcummed his nice meaty weiner.
by Spanky McNutt August 6, 2008
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(adj) referring to anything small. This reference usually occurs while hanging out with a group of people for an extended amount of time. Given enough time, someone in the group will probably sing the phrase "mini sirloin burgers" from the Jack in the Box commercial with the midgets and the infectious jingle. Subsequently it gets stuck in everyone's head and references to anything small become "mini sirloin"
petite girl: I can't hold all of these bags things at once!

big guy: Well hand them to me, I'm surprised you can hold on to anything with those mini sirloin hands.
by Changus Kahn July 11, 2009
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When your closing ability is bang pukka
I just paid 15k to be cold …
Must be a 10Sirloin
by Amexking May 15, 2023
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