not have a leg to stand on

Translations
не иметь никаких доказательств
Without any witnesses, you don't have a leg to stand on in court.
Без свидетелей у тебя нет никаких доказательств в суде.
Definitions
To be in a situation where you cannot prove or support your argument, claim, or position because you lack evidence or justification.
Words
not

adverb
не
have

verb
иметь
a

article or possessive pronoun
один
leg

noun
нога
to

preposition
чтобы
stand

verb
стоять
on

preposition
на