twinnie

noun

twinnie

noun

Etymology From twin + -ie.

1

A surfboard with two fins.

The twin-fin or “twinnie” is probably the most popular new surfboard of the last few years. Twinnies have short, wide tails and two big fins. They combine the fast turning of a shortboard with the wave catching of a longboard.2012, Paul Mason, Surfing, page 10:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.