From Wiktionary, the free dictionary
Literally, “even if I hang myself”, or more loosely translated as “I might as well hang myself”.
хоть ве́шайся • (xotʹ véšajsja)
- what to do?; nothing to do (expresses despair, inability to get out of a difficult situation)
Не ве́рите мне ника́к, хоть ве́шайся.- Ne vérite mne nikák, xotʹ véšajsja.
- You don't believe me at all, what to do?