When the crowd responded to the show so positively, we realized we were 'onto something'. [=we had done/discovered something important, special, etc.]
Scientists believe they are 'onto' something big. [=scientists believe they are close to making an important discovery]
Don't try to shift the blame 'onto' me. [=don't try to blame me instead of the person who should be blamed]
(..) Should we, er... Oh, yes, I won't forget this, I promise. Oh, sure. Is Claire here yet? No, not yet. You're an angel for being here. Would you just hold onto that and there are bottles for topping up on the little bar just inside. I'm the luckiest thing to have you. And erm... there. (..)2016 TvShow: Fleabag Title: Episode #1.6 Season: 1 Episode 6