imaginary lat syndrome UK /ɪˌmæd͡ʒɪn(ə)ɹi ˈlæt ˌsɪndɹəʊm/US /ɪˌmæd͡ʒɪˌnɛɹi ˈlæt ˌsɪndɹoʊm/ noun1 •(humorous) A tendency for one to adopt a posture as if one had larger latissimus dorsi muscles than one actually has, especially a posture where the arms are held away from the torso.Neophytes, for example, risk being ridiculed by other gym members if they walk this way: ‘Aghh, look at him! He’s got ILS [Imaginary Lat Syndrome]’. — 2001
