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Belligerent Sexual Tension, when two parties show hostility to each other in an effort to hide their sexual tension.

Both have acknowledged their attraction but try to refuse to act on it or choose to ignore it by acting hostile towards each other.
You can just smell the BST rolling off the two rivals.
by jpeguser March 26, 2013
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British Summer Time (BST)

A time zone in England.
Yo man... BST is so much cooler than GMT!
by Chris W. July 13, 2005
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Black Standard Time, which also means 'late'
Boy: "Where is Shanishiqua? The movie is starting."
Girl: "Well she's on BST so she'll be here in 20 mins"
by irish99 July 15, 2011
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Acronym for "Big Saucy Tits". Refers to extremely nice breasts. Stems from the spelling of breast, containing B, S, and T in that order. Because BST stands for "binary search tree" in computer science, the word "balanced" usually proceeds BST.
Wow, Lindsey's hottest feature is her rack of juicy balanced BSTs.

The second I looked up and saw some massive BSTs, I immediately knew I was staring at Bird's mom's beautiful bosom.
by Big Dog Football Boss October 29, 2013
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