Learn how to say Tobogganist correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word toboggan:
a long, light, narrow vehicle, typically on runners, used for sliding downhill over snow or ice.
[no object] (usually as noun tobogganing)
ride on a toboggan:
he thought he would enjoy the tobogganing
early 19th century: from Canadian French tabaganne, from Micmac topaĝan ‘sled’
Remember that toboggan is spelled with one b and a double g.