1) A conjoined pair yelling simultaneously
2) (Colloq.) An occurance which is oft considered the apex of romantic pleasure, known in the medical parlance as a "simultaneous orgasm", in which both partners attain climax at the same moment. (From Siamese twins, referrencing the paired screaming and physical interconnectedness)
"How was your date?" Kathryn asked. "Oh!" Julie replied, "It was fabulous! We started the night with coffee, and ended it with a Siamese scream."
by Earnest June 26, 2006
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A cat with short hair and colour points along with blue eyes. It also has beige fur.
by MEEZERMEOWBOI January 17, 2021
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Where two parties to a criminal act keep evidence against the other ensuring both mouths stay shut. Because of their actions they are joined like Siamese twins.
For instance, a politician who takes a bribe keeps evidence, Siamese insurance, against the person who bribed him.
by SteveDScot October 9, 2013
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A siamese spliff involves the the simultaneous handling of both a traditional cannabis joint or spliff and an ordinary cigarette.
In no particular order the user will inhale from one and then the other.
Kelly suggested to Weston that they fire up a siamese spliff. He gleefully agreed. She finished rolling a joint as Weston tossed her a cigarette. They took turns taking deep drags untill the siamese spliff was no more.
by westonshow August 18, 2011
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A man and woman (X&Y)loving in unison (an everlasting embrance) that spans time and existance.
"finishing each others sentences, thinking the same thoughts, sensing one anothers feelings, living through
one anothers desires (why does it have to be a siamese dream?!)"
by Starboy August 17, 2007
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A crossjoint (two joints sharing a single point of intersection) as made famous by Saul Silver in the movie Pineapple Express.
Lets smoke the siamese blunt first, otherwise it's gonna break when I put it in my pocket.
by NOVIAN August 23, 2009
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Two guys who cannot function separately now that they are in a relationship
"Do you think Kyle would want my extra ticket to the Beyoncé concert?"

"There's just one ticket?"

"Yup."

"He probably would if he wasn't dating Zak. You know how it is with Siamese boyfriends."
by badshirley October 26, 2013
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