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A word often used in autralia to describe ones penis and/or testicles.
"Awwww mate, she sucked me tillywag"

"Guvna, put some shrimp on da barby"
"Ill put your tillywag on the barby if you ask me one more time!"

"oohh you threw that snowball and it hit Aristotle in the tillywag!"
"haha I know mate"
by Tillywagger January 03, 2010
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