Definition

Slang term meaning excellent, awesome, or fantastic; popularized by 1980s California beach and surf culture. It conveys enthusiastic approval of something cool or rad.

Example Usage

That surfing move was totally tubular, dude!

Origin

Derived from the tube-shaped hollow center of a perfect wave that surfers seek to ride through.

Fun Fact

Became a quintessential 1980s slang term and featured prominently in 'Bill & Ted's Excellent Adventure' (1989).

Source: Definition backfill (hailey)