No - you can estimate a horse's age by looking at its teeth. Looking a "gift horse in the mouth" would be like judging the gift's value or appearing ungrateful. The general idea is: it may not be ideal (like an old horse) but it was free & you can still make good use of it & be grateful for having one at all.
It did not come from anywhere, the phrase should be 'Happy as a pig in muck/mud'. This creates an image of a pig rooting through a muddy field looking for roots/grubs in the ground which is their natural way of feeding.
A mnemonic is a phrase that helps people remember important facts. This phrase can be remembered using the phrase "Mad artifacts dig yonder".
The phrase like a cat in a corn crib is a simile. The phrase means that the cat is sneaky and can not be detected.
It's either A,And or the
The phrase selective pressure means any reason for organisms to have a survival benefit. These certain phenotypes may also have its disadvantages.
According to Wiktionary, one of the possible origins of this phrase dates back to the legend of Medusa, who was the mythological being who could turn any creature or being into stone by just looking them in the eye.
Fight like a Trojan is a phrase used to tell someone to give it their all. This phrase came from the war in the past where the Trojan's put up a very hard fight.
The first occurrence of the phrase "I am legend" that I'm personally aware of comes from the Richard Matheson story "I Am Legend."
from joey in friends
It is a French phrase.
from girls ...to hissy...
in concord and lexington.