If push comes to shove

If push comes to shove: se acontecer o pior, se (o que pretendo fazer) não der certo..., se as coisas piorarem

“I've made up my mind and I'm going to have a career in music. I'd love to be in a successful band, but if push comes to shove I can earn money by teaching guitar.

Sandy says she really wants to stay in her apartment, but if push comes to shove she'll just have to move out and find somewhere cheaper. (www.englishclub.com)