This is the 8172nd most frequent Russian word.
лох
A slang term meaning "dupe," "fool," or "loser."
In this sentence, 'лохом' is used as slang to describe a person who is naive or easily deceived.
Он оказался лохом, доверившись мошеннику.
He turned out to be a fool, trusting the fraudster.
Here, 'лох' implies a certain unfashionable or awkward appearance.
Этот костюм делает тебя выглядящим как лох.
This suit makes you look like a fool.
The word 'лохом' here is used to advise someone against being reckless or gullible.