The phrase "slip one over on" means to deceive or trick someone. The tricky part about this phrase is the spelling of "slip one over" with the pronunciation of the "o" in "over" being different in American and British English. In American English, "over" is pronounced as "oh-ver" with the "o" sounding like the "oh" in "Nova". In British English, "over" is pronounced as "ohh-vah" with the "o" sounding like the "ahh" in "father". Both pronunciations are correct, but make sure to use the correct spelling depending on your intended audience.
The phrase "slip one over on" is an idiomatic expression that means to deceive, trick, or outsmart someone in a cunning or sly manner. It implies an act of manipulating a situation or person for personal gain or advantage, often at the expense of others. This phrase is colloquial and its usage is more informal and conversational.
When someone "slips one over on" another person, they typically employ subtle tactics, such as misdirection, clever persuasion, or deceit, to achieve their desired outcome. This can involve concealing their true intentions, providing false information, or taking advantage of a person's vulnerability or trust. The person being deceived is usually unsuspecting and unaware of the trickery until it is too late.
The phrase can be applied to various situations, including business dealings, personal relationships, or even everyday encounters. For example, someone might "slip one over on" their colleague by stealing credit for their work, or an individual might "slip one over on" a salesperson by negotiating a lower price than initially offered.
While "slipping one over on" someone often implies dishonesty or cunning, it can also be used more playfully or in good humor, without malicious intent. Regardless of the context, the phrase suggests a certain level of cleverness or shrewdness on the part of the individual who successfully tricks or outwits another.