tubular (adj.)youdaoicibaDictYouDict[tubular 词源字典]
1670s, "having the form of a tube or pipe," from Latin tubulus "a small pipe" (see tube) + -ar. Teen slang sense attested by 1982, Valspeak, apparently from surfers' use of tube as slang for a hollow, curling wave, ideal for riding (1962).[tubular etymology, tubular origin, 英语词源]