one–shot 
/ˈwʌnˌʃɑ:t/ adjective
always used before a noun /ˈwʌnˌʃɑ:t/ adjective chiefly US, informal : done or happening only once
▪ a one-shot tax cut ▪ a one-shot offer/deal
▪ a one-shot tax cut ▪ a one-shot offer/deal
— one–shot noun, plural one–shots [count]
▪ These tax cuts are strictly one-shots.
▪ These tax cuts are strictly one-shots.
