Meaning of THIN in English
(WEAK) [adjective] thinner, thinnest - weak or of poor qualitya thin excusethin humoura thin disguisea thin nervous voicea thin smileTo have a thin time (of it) is to have bad or unhappy experiences.He's been having a thin time (of it) since his accident.
Cambridge English vocab. Кембриджский английский словарь. 2012