under your own steam

under (one's) own steam

On one's own; with no assistance from anyone else. The injured player was fortunately able to walk off the field under his own steam. Look, Mom, I can finish this book report under my own steam, OK? I don't need you hovering over me correcting my spelling!
See also: own, steam
Farlex Dictionary of Idioms.

under your own steam

1. If you go somewhere under your own steam, you make your own arrangements for the journey, rather than letting someone else organize it for you or take you. Note: The following expressions refer to the use of steam to provide power for a machine, especially a steam engine. You can go on an organised bus tour of the region or you can take off into the hills under your own steam.
2. If you do something under your own steam, you do it on your own and without help from anyone else. Note: The following expressions refer to the use of steam to provide power for a machine, especially a steam engine. He left the group convinced he could do better under his own steam.
See also: own, steam
Collins COBUILD Idioms Dictionary, 3rd ed.

under your own steam

without assistance from others.
1996 Colin Bateman Of Wee Sweetie Mice & Men She was starting to move under her own steam, hesitant Bambi steps which weren't helped by being hurried along, but a good sign nevertheless.
See also: own, steam
Farlex Partner Idioms Dictionary

(get/go somewhere) under your own ˈsteam

(British English, informal) (get/go somewhere) without help from others: Don’t worry about arranging transport for us. We can get there under our own steam.
See also: own, steam
Farlex Partner Idioms Dictionary
See also:
  • at will
  • on one's own account
  • chew (one's) own tobacco
  • chew own tobacco
  • noggin
  • of (one's) own accord
  • of one's own accord
  • of own accord
  • of your own accord
  • do something in your own sweet time/way
References in periodicals archive
Should you head off under your own steam, you won't get compensated for the cost of that journey by the airline, and possibly not by your insurer.
EU AND YOUR FLY RIGHTS
There will also be a chance to explore under your own steam, perhaps joining the crowds of shoppers in Grafton Street or O'Connell Street, discovering historic Trinity College with its ancient Celtic Book of Kells, or visiting the Guinness Storehouse on our optional excursion.
Four-star Dublin and theWicklow Mountains from Cardiff Airport
There will also be a chance to explore under your own steam, perhaps joining the crowds of shoppers in Grafton Street or O'Connell Streets, discovering historic Trinity College with its ancient Celtic Book of Kells, or visiting the Guinness Storehouse on our optional excursion.
Four star Dublin and the Wicklow Mountains
In Edinburgh, there's a chance to visit Britannia or go sightseeing under your own steam.
Holidays: Travel Shop: Yacht a holiday
But if you have genuinely done it under your own steam, you should not worry about it and get on with producing and bringing it to the market.
A SPOONFUL OF SUGAR: Tap into imagination