land yacht

US /ˈlænd ˌjɑːt/
UK /ˈlænd ˌjɑːt/
"land yacht" picture
1.

a large, luxurious car, especially one from the 1970s or 1980s, that is perceived as being large and cumbersome like a yacht

:
My grandfather used to drive a huge land yacht, a classic American car from the 70s.
Modern cars are much more fuel-efficient than those old land yachts.
2.

a vehicle with sails designed to be propelled by wind over land, typically on beaches or dry lake beds

:
They raced their land yachts across the vast salt flats.
Learning to operate a land yacht requires skill and practice.