if worst comes to worst

(if) worse / worst comes to worst (if the worst possible thing happens; if things really get bad) — в крайнем случае, в худшем случае; на худой конец

Example 1: Worse comes to worst, you can always hop in a taxi. — На худой конец можешь взять такси.

Example 2: I know you’re running out of money. If worse comes to worst, you can always sell some of your jewelry. — Я знаю, что у тебя на исходе. Но в крайнем случае ты всегда можешь продать какую-то часть драгоценностей.

Related vocabulary:
[worst case scenario]
[at worst]
The more logical “worse comes to worst” is gaining popularity, according to “Garner’s Modern American Usage” , but “worst comes to worst” is still Webster’s preference.