The colloquial expression t’en as un oeil is informal and primarily spoken. It comments on someone’s bold, cheeky, or audacious behaviour. Although oeil is the regular noun for “eye,” the figurative meaning is unrelated to vision or appearance.

Literal meaning

Literally, t’en as un oeil corresponds to “you of it have an eye.”
The structure combines:

• tu (you)
• en (of it)
• as (have)
• un oeil (an eye)

This literal wording does not point toward the figurative sense, which instead reflects idiomatic development and colloquial usage.

Figurative meaning

Figuratively, t’en as un oeil means “you’ve got a nerve.” It expresses surprise, irritation, or amused admiration at someone’s boldness or shameless behaviour.

It can imply:

• someone dares to ask for something inappropriate
• someone is pushing boundaries
• someone is acting cheekily or without hesitation
• someone is bold in a way that surprises the speaker

Tone determines whether it feels joking, affectionate, mildly reproachful, or sarcastic.

Usage examples

All French phrases appear in italics.

• T’en as un oeil de me demander ça.
  You’ve got a nerve asking me that.
• T’en as un oeil de revenir après tout ça.
  You’ve got a nerve coming back after all that.
• Ah oui, t’en as un oeil, toi.
  Oh yes, you’ve got some nerve.
• T’en as un oeil de lui parler comme ça.
  You’ve got a nerve talking to him like that.
• Il en a un oeil de te dire ça.
  He’s got a nerve saying that to you.
• T’en as un oeil d’imaginer que je vais accepter.
  You’ve got some nerve thinking I’ll agree.

Related expressions

French offers several informal ways to express the idea of nerve, boldness, or cheek.

• Tu ne manques pas d’air.
  You’ve got a nerve.
• Tu es culotté.
  You’re cheeky.
• Tu ne doutes de rien.
  You don’t hesitate to push limits.
• Quel culot !
  You’ve got some nerve!

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Summary

T’en as un oeil literally translates as “you of it have an eye,” but it idiomatically means “you’ve got a nerve.” It comments on someone’s bold or cheeky behaviour. The expression is informal and used mainly in speech, with tone guiding whether it is playful or reproachful.