not have a leg to stand on

Meaning

1. to be in a position where you are unable to prove sth or explain why sth is reasonable

   Without written evidence, we don't have a leg to stand on.

In the movies · 1

• You guys don't have a fucking leg to stand on.The Usual Suspects1995

From the same entry

• break a leg
• get your leg over
• have legs
• cost an arm and a leg
• as fast as your legs can carry you
• be on your last legs
• pull leg
• shake a leg
• stretch your legs
• with your tail between your legs
• talk the hind leg off a donkey
• leg it