Green’s Dictionary of Slang

it n.2

as an indefinite object, used with a v., e.g. walk it, cab it.

[UK]J.K. Jerome Three Men in a Boat 27: We therefore decided we would sleep out on fine nights, and hotel it, and inn it, and pub it, like respectable folks, when it was wet.
[Aus]Bulletin Reciter 1880–1901 197: We didn’t ‘cab-it’ home until the sun began to shine.
[UK]‘Doss Chiderdoss’ ‘Habits’ Sporting Times 16 Jan. 1/2: She ignores the rail, and scorns to ’bus or cab it.
D. Else England 160: If you’re planning to bus it a lot it’s worth buying a book of six tickets.