i-adjective
very tiresome; exhausting; a damn nuisance
Slang contraction of 正直しんどい (shōjiki shindoi), meaning 'honestly, it's a pain'. Used to express strong annoyance or fatigue, often in casual speech.
この仕事、しょんどいわ。
This job is such a pain.
毎日残業でしょんどい。
Every day overtime is exhausting.
しんどい is the standard dialectal/slang adjective for 'tiresome' or 'exhausting'. しょんどい is a more emphatic, contracted form from 正直しんどい, adding a nuance of 'honestly, it's a pain'.
Contraction of 正直しんどい (shōjiki shindoi), literally 'honestly tiresome'. The exact origin of しんどい is uncertain, but it is a common Kansai dialect word for 'tiring' or 'troublesome'.