Over pronounciation of Innit mate Used when strongly agreeing with what is said. Positve body action are often used to emphasise one's similar opinion.

It originated when innit mate just didn't express the feeling.
Daryl: You know Jayne?
Joe: Yeah?
Daryl: She's perfect
Joe: IN TIT MATE! (Begins imitating sex with cusion)

Tom: I think i have discovered the meaning of life!
Rob: Yeah but, wouldn't you rather order pizza?
Tom: In tit mate! (flails arms with joy)
by Kid Nock January 10, 2006
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