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an exclamation, popularized by cr7 when he screamed it waay too loud
used to show enthusiasm, or just to make noise
can also be spelled suiu, soii, or SIIUUU
Teacher: "aaaand, class dismissed!"
Student: "siu!"
siu by JJ Q. Q. Q. Esq. March 1, 2023
Related Words
Siu siuuu siuu siuuuu siu4 SIUC Siul Sium siuuuuuu SIUYA
Siuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
Person 1: Hi, I'm also a fan of Chris...
Person 2: Siuuuuuuuuuuuuuuuu...
SIU by Sun Tsu April 30, 2023
Siu is a word for saying when you are extraordinaly happy.It is commonly used by the famous footballer Cristiano Ronaldo Dos Santos Aveiro
Siu! by Leooooooooooooooo November 29, 2024
she teach at LSC. she always say 'eh'
A: are u siu 姐?
B: ehh...
A: you are.
siu 姐 by kil.me.321 October 28, 2019

siu girl 

siu girl likes to say ehh
A:are u siu girl?
B:ehh...
A:you R
siu girl by kil.me.321 October 29, 2019

SIU SII SMD 

The abbrevation for the commonly used phrase

"Suck it up, suck it in, suck my dick"

A phrase used by lovely guys with excellent manners.
Girl : I don't wanna send you pix of me in a bra...i'm self concious :/

Boy: Uhh SIU SII SMD...

Girl: wtf...
SIU SII SMD by lizbrez March 22, 2009