a snake in the grass

This is the definition of American English. Look at British English definition of snake in grass

Snakes in the grass are immoral people, those who are harmful but do not look at eyes. A snake in the grass may be a mean person who looks even friendly, without harm, but it is actually dangerous. The snake in the grass was initially used by the third Eclogue poet Virgil, a nematode in the grass, and meant "snake lurking in the grass". About 1290, this sentence moved to the UK and became Latin slang and English Latin. In other words, it means "everything looks beautiful, but snakes lurk in the grass." If it is used as an adjective before a noun, that phrase is hyphenated on the grass

Explaining that someone is a snake in the lawn means they are fakes. Because they pretend to be your friends, but they actually hurt you. He is a snake in the lawn - a person you can not trust. Note: This sentence was originally used by Roman poet Virgil 's work "The Eclogues" to show the danger of being hidden.

Spiders seem very common to Vinnie. If there is a local "best" predator, it is a grass snake. The grass snake never stops growing, and teeth, tongue, bones, scales, eating, and clearly lives forever. Winnie wants to communicate with the grass snake, probably asks for that name, but he does not know how to open a conversation. "Did you try sending a signal to some women? Peck? Do you blink? Will you do some loud conversation?" Winni hated mosquitoes. Snoring without their brains ruined the crystal clear beauty of his evening flight. When mosquitoes are filled with blood, they have serious danger of collision. "There is water, there is a bad smell in the water, there are no parasites on the pheromone's head.Togay there are clouds and a big carnival.I will take you right there.Tail light , Then you and I will grow like robbers. "