take (one) up on (something)(redirected from take him up on)
take (one) up on (something)
To agree to an offer one had made, especially one made previously. I'm coming to town this weekend, so can I take you up on that spare bedroom you've offered me in the past?
take someone up on something
to accept an offer that someone has made. That's a good offer. I'll take you up on it. Tom took Sue up on her offer of dinner.