Crossword puzzle clue "put one's legs up"

"I go on four legs in the morning, on two legs in the afternoon, and on three legs in the evening ..."

Source of the maxim "Four legs good, two legs bad"

Put one's legs up

Retreat with one's tail between one's legs

Move with one's tail between one's legs

One with long, luscious legs

One of man's three legs, in the riddle of the Sphinx

Each of them is "one who, in a perilous emergency, thinks with his legs": Bierce