Lambo is best known from the question "when Lambo?", which is covered in full under When Lambo. This page explains the single word and how it is used on its own.
"Lambo" is a nickname for a Lamborghini, the Italian supercar. In crypto communities it became a symbol of the life-changing gains that early holders of a coin hoped to make, so a person might say they are "saving for a Lambo" or post a picture of one when a token rallies. It sits alongside other optimistic slang such as to the moon and when moon, which describe prices rising sharply.
The word is used mostly in jest, and often in irony during falling markets, when talk of supercars gives way to jokes about losses. It reflects the speculative mood of retail trading rather than any measure of value, and it is closely tied to fear of missing out. Social-media posts that promise followers a Lambo are a common feature of hype around new tokens, and regulators warn that such promises of quick riches are a hallmark of pump-and-dump schemes. The term has no technical meaning and is not tied to any particular coin.