непрочный(not very well made; likely to break • a flimsy boat); тонкий; хрупкий; неосновательный; шаткий; неубедительный; неустойчивый(this means "weak" • a flimsy cardboard box • a flimsy excuseBecky Blackley); сопливый; ненадёжный(a flimsy reference pointivp); надуманный(of a pretext or account, weak and unconvincing • a pretty flimsy excuse. NOED • по любому надуманному поводу — on the flimsiest of grounds • Every official inquiry exonerated the perpetrators, dismissing robust evidence on the flimsiest of grounds.Alexander Demidov); хлипкий(The newer knives feel flimsy and cheap.Osalva); жидкий(of furniture, buildings, etc); лёгкий(о ткани; thin and light • You'll be cold in those flimsy clothes); поверхностный; зыбкий(a concept resting on so flimsy a groundStas-Soleil); пустой; пошлый; некрепкий; счёта; банальный; нескладный(в различных смыслах • In spite of the flimsy story and routine screenplay where a youth grows to be a "dada", the dialogs elevate the quality of the movie and make it very enjoyable. • He had always believed himself to be a flimsy man, a chip in the current of life. • They trouble no one and should be left alone, not parched and pressed into some flimsy poem.Abysslooker)