let on
Upper Intermediate (B2)informal
To tell or hint at something you were supposed to keep secret.
"Don't let on that you've already seen the surprise — just act shocked."
Hear it in context

I Use These Phrasal Verbs Every Day — You Should Too!
English with Greg · 15:23
Okay, the next one is let on.

How to Heal Your Trust Issues
Call Her Daddy · 16:26
ever let on, but obviously they're his friends.

OMG... Trump Actually Posted THIS
Harry Sisson · 2:15
Pete Hegseth has let on which surprise Pete Hegseth lies.

The BEST Singers That Blew the Judges Away on Britain's Got Talent 2026!
Got Talent Global · 63:17
[singing] but when he's near me, I don't [music] let on.

Best of Dwight & Margaret’s Schemes 🤨 Tulsa King
Tulsa King Official · 5:45
Who's saying you don't have to still let on that you