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1.
a texted curse placed on the person you are texting with when he or she simultaneously texts the same thing you do.
Bob and Joe are texting each other, discussing the closing of their favorite sports pub. At the same time, they both send "this sux!"

"Tinx!"
by hmcdesq May 17, 2010
 
2.
when you want to say thanks sarcastically.
'i hate you and you smell'
'tinx'
by tinxtinx November 01, 2007
 
3.
The expression when one's eyes are squinty and mouth open.
Oh crap! That girl just Tinxed me!
by Bamboo June 04, 2004