on the lam
on the lam {adj.} or {adv. phr.}, {slang}
Running away, especially from the law; in flight.
The bank robber was on the lam for ten months before the police caught him.
- Sometimes used in the phrase "take it on the lam".
After a big quarrel with her father, the girl took it on the lam.
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Source: A Dictionary of American Idioms
