Here are some possibilities based on common usage:
* Standing on my own two feet: This means being independent and self-sufficient, capable of taking care of oneself without relying on others.
* Standing on my principles: This means adhering to one's beliefs and morals, even if it's difficult or unpopular.
* Standing on my record: This means being confident in one's past accomplishments and achievements.
* Standing on my ground: This means being firm and resolute in one's position, refusing to back down.
* Standing on my toes: This means being alert and attentive, ready to take action.
To understand the specific meaning of the phrase, please provide the complete sentence or context.