Hype is the buzz and noisy promotion around a project that everyone is talking about. The term describes the peak of mass interest, which is not always backed by real value.
"To the moon" is a slang expression of the crypto community that describes a sharp and rapid rise in a cryptocurrency's price. The image of a "flight to the Moon" reflects the expectation of a strong rise in an asset's price and the optimism of its holders.
A FUDster is a person who deliberately spreads fear, uncertainty, and doubt around a crypto project. The goal of such actions is to influence the sentiment of market participants.
A beginner (noob, newbie) is a person who has just started to learn about cryptocurrencies or has recently appeared in a themed community. The term describes a level of experience, not a judgment of the person.
In Russian-speaking slang a "loss" (from the English loss) is a nickname for a trading loss on an exchange. Most often it refers to closing a position with a loss of funds, including when a stop order is triggered.
A dev is a colloquial name for a developer, that is, a specialist who creates and maintains the code of cryptocurrencies, blockchain protocols, wallets, and related applications. The development of a project largely depends on devs.
Get Rekt is a slang expression meaning the crushing failure of a trader or investor. It is most often said of those who suffered large losses due to a bad trade or a sharp market move.