IPA: //ˈslaʊtʃi.nəs//
KK: /ˈslaʊtʃiˌnɪs/
The condition of sitting or standing in a lazy or relaxed way, often with the shoulders drooping and the back bent.
His slouchiness made him look unprofessional during the meeting.
Slouchiness → It is formed from "slouch" (of uncertain origin, possibly from the dialectal English 'slouch' meaning to droop or sag) and "-iness" (a suffix meaning the quality of). The word "slouchiness" refers to the quality of being slouched or having a drooping posture.
Think of the word 'slouch' which describes a drooping posture, and remember that 'slouchiness' means the quality of having that droopy stance.