Английский словарь американских идиом - back-to-back

{adv.} 1. Immediately following. * /The health clinic had back-to-back appointments for the new students during the first week of school./ 2. Very close to, as if touching. * /Sardines are always packed in the can back-to-back./ * /The bus was so full that people had to stand back-to-back./