count (one) in on (something)(redirected from count someone in on)
count (one) in on (something)
To include one in some activity or plan, especially as participants are being recruited. Often used as an imperative. Count me in on the trip to the amusement park! I hope they count us in on the deal.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.