(idiomatic) That ever lived.

To behave in a proper and lawful manner; to obey the rules and expectations of society. / Used other than figuratively or idiomatically: see walk, straight, line.

(idiomatic) To abandon or leave; to shun; to refuse. / (idiomatic) To escape (a mishap, accident, etc.) with minimal or no injury. / (idiomatic) To outpace effortlessly.

Third-person singular simple present indicative form of walk in straight lines

To adhere to a plan, protocol, or train of thought without any deviation or distraction; to stick to the straight and narrow. / Used other than figuratively or idiomatically: see walk, straight, line.

(slang, archaic) To depart; to go away without ceremony.

Ambystoma mexicanum (axolotl)

present participle of walk in straight lines

(intelligence) To retrace events so as to determine where an operation went wrong and who was responsible. / (diplomacy) To back down; to adopt a position where one is more willing to compromise.

Synonym of walk the chalk (“keep a correct course in manners or morals”)