"gassing" in the noun sense
the process of interacting with gas
the deliberate act of poisoning some person or animal with gas
"gassing" in the verb sense
attack with gas subject to gas fumes
"The despot gassed the rebellious tribes"
2. boast, tout, swash, shoot a line, brag, gas, blow, bluster, vaunt, gasconade
Source: WordNet® (An amazing lexical database of English)
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