"Tei" is a common...I dunno what you'd call it...battle cry? Noise to accompany a punch or kick. Always good when the puns shift over to English so easily.
Watch this!Tei!What do you think, Chen?!What...? "Shouldn't the 'i' be a wi'?"Teiii!Tewi's new killer technique, the "Inaba Screw"!That's none of your business!