scoosh (Scot)
vb
1 to squirt
2 intr (of liquid) to rush
n
3 a squirt or rush of liquid
4 any fizzy drink
(C19: of imitative origin)
In the west of Scotland, it also means 'easy' - as in 'a scoosh job' or 'that's a scoosh' = easy-peasy
Comes from the name of a sailing boat I used to co-own, when we used to say it was the sound the water made as it rushed past the hull at 15 kts.
Also a ladies clothing shop in Edimbra. We never got round to asking them for sponsorship