Wiktionary
tasis
n. 1 (context prosody English) Extending the sound of an utterance for the pleasure of saying or hearing it. 2 (context usually in combination medicine English) A stretching.
Wikipedia
Tasis (rapper)
Markku Lauri Johannes Wettenranta, better known by his stage name Tasis, is a Finnish rapper. Besides being one of the founders of the record company Rähinä Records, Tasis was also part of the group Kapasiteettiyksikkö together with Uniikki and Andu.