1. A weak, unconvincing, or poorly constructed story or excuse that lacks credibility or substance
His flimsy tale about missing the meeting didn't fool anyone.
Sua história frágil sobre ter perdido a reunião não enganou ninguém.
2. An implausible narrative or account that is easily seen through or doubted
The witness provided a flimsy tale that fell apart under cross-examination.
A testemunha apresentou uma desculpa fraca que desabou sob interrogatório.