Middle English/Early Modern English contraction of "it is".
Tis a way of speaking no longer used.

Whether tis nobler in the mind to suffer the slings and arrow of outrageous fortune. (A line of the soliloquy from Shakespear's Hamlet)
by Sorwen November 04, 2011
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The mysterious and poorly-defined zone of flesh marking the transition between the penis and the balls. Contrary to the more exclusive taint, 'tis, at the same time, both your dick and your balls.
"It's not a real BJ if the lips don't hit the tis"
"I was tis deep"
by mtray February 14, 2018
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A conjunction used instead of saying it is or it's.
the word was the most popular in the medi-evil era,

commonly in shakespearian play
but is used modernlys as well.
girl-whats your name?
boy- "tis" jeremy
girl- oh how pleasent
by Aletse April 20, 2010
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The Danish word for pee (urine).
Morgentis plejer at lugte særligt dårligt.
by Pastaklovn August 06, 2008
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