Top definition
Nick name for the naval Phalanx anti-missile defense gun derived from it's side profile.
Hey mate, check out our M61. It looks like R2D2 with a hard on!

Don't worry 'bout incoming. R2's hard. He'll take her down.
by Eddy May 29, 2007
Get the mug
Get a R2D2 With A Hard On mug for your Aunt Larisa.