One way to hold this word: a huge soft bag pumped full of gas. There is no hard frame anywhere in it — the shape you see is the gas pushing outward against a soft skin. Fill it and it is round, fat and slow; let the gas out and it collapses into a heap of cloth. Most later uses of blimp can be read off that one picture of something swollen up from the inside.
From the word’s history
The origin is not settled. The account most often given is that the word imitates the sound a non-rigid airship makes when its skin is thumped, and credits Lt. A. D. Cunningham of the British Royal Navy in 1915. The often-repeated story about military classes Type A-rigid and Type B-limp is recorded as false.
這個字的來源沒有定論。最常被提到的說法是：它模仿的是敲打軟式飛艇外皮時發出的聲音，並把造詞歸給一九一五年英國皇家海軍的 Cunningham 中尉。另外那個流傳很廣的「軍方編號 Type A-rigid／Type B-limp」故事，來源明確記為假的。
Wiktionary, English entry 'blimp' (packet source_ref kaikki:3f6f69a190036ae4:587926930); 'Blimp' entry kaikki:3f6f69a190036ae4:936528635
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