Slip one over on somebody
phrase
To deceive or trick someone.
He managed to slip one over on his parents and went to the party without getting caught.

Often appears as...
- managed to slip one over
- trying to slip one over
Usage tips
Informal, Disapproving
Colloquial
phrase
To outsmart someone in a sneaky or deceitful manner.
You have to watch out for him; he is always trying to slip one over on you.

Often appears as...
- always trying to slip one over
- never slips one over
Usage tips
Informal, Disapproving
Idiomatic
phrase
To deceive or trick someone.
He managed to slip one over on his parents and went to the party without getting caught.

Often appears as...
- managed to slip one over
- trying to slip one over
Usage tips
Informal, Disapproving
Colloquial
phrase
To outsmart someone in a sneaky or deceitful manner.
You have to watch out for him; he is always trying to slip one over on you.

Often appears as...
- always trying to slip one over
- never slips one over
Usage tips
Informal, Disapproving
Idiomatic
Definition 1 of 2

Negative Connotation
The phrase often implies negative judgment towards the deceiver.

She felt guilty after managing to slip one over on her friend.
Colloquial Use
Primarily used in informal situations among friends or in spoken dialogue.

Isn't he sly? He slipped one over on the teacher again.
Caution with Usage
Be careful not to offend when accusing someone of this action.

Are you accusing me of trying to slip one over on you?
Negative Connotation
The phrase often implies negative judgment towards the deceiver.

She felt guilty after managing to slip one over on her friend.
Colloquial Use
Primarily used in informal situations among friends or in spoken dialogue.

Isn't he sly? He slipped one over on the teacher again.
Caution with Usage
Be careful not to offend when accusing someone of this action.

Are you accusing me of trying to slip one over on you?
Negative Connotation
The phrase often implies negative judgment towards the deceiver.

She felt guilty after managing to slip one over on her friend.
Colloquial Use
Primarily used in informal situations among friends or in spoken dialogue.

Isn't he sly? He slipped one over on the teacher again.
Caution with Usage
Be careful not to offend when accusing someone of this action.

Are you accusing me of trying to slip one over on you?
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