"flimsy" in the noun sense
1. onionskin, flimsy
a thin strong lightweight translucent paper used especially for making carbon copies
"flimsy" in the adjective sense
1. flimsy, insubstantial
lacking solidity or strength
"a flimsy table"
"flimsy construction"
"vinyl siding has become the standard-bearer for cheap, insubstantial construction"
2. unconvincing, flimsy
not convincing
"a flimsy argument"
"as unconvincing as a forced smile"
3. flimsy, fragile, slight, tenuous, thin
lacking substance or significance
"slight evidence"
"a tenuous argument"
"a thin plot"
"a fragile claim to fame"
Source: WordNet® (An amazing lexical database of English)
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