Terms for subject British

English	Russian
don't be an ass	не валяй дурака (Don't be an ass! You're not going out with George after what he did to you! ART Vancouver)
don't be an ass	не дури (Don't be an ass! You're not going out with George after what he did to you! ART Vancouver)
make an ass of oneself	опростоволоситься ("I can give the explanation. Boko has gone and made an ass of himself again!" (P.G. Wodehouse) ART Vancouver)
on an arising basis	по факту возникновения (lenivets:))
pick up an acquaintance with	завязать знакомство с ('I went in the shape of a loafer to Sir George's house, managed to pick up an acquaintance with his valet (…)' (Sir Arthur Conan Doyle) ART Vancouver)
within an ace of something	чуть не (Alexander Demidov)
within an ace of something	на грани (Alexander Demidov)
within an ace of something	на волосок от (Alexander Demidov)
within an ace of something	чуть было не (Alexander Demidov)
within an ace of something	чуть-чуть (to come, be. "The defendant was intent on murder and he came within an ace of succeeding." (CCDI) Alexander Demidov)
within an ace of something	успех (Alexander Demidov)