Top Definition
An individual whose sole reason for visiting Cuba is to experience life on this lovely island while Fidel Castro is still in power.
Did you hear how much my cousin paid to visit Cuba?

I know... I know... that freakin' Castronaut still owes me 40 bucks. He tried to pay me with some shit-stained Cohibas!

He probably smuggled them in his poop shoot.

Wouldn't be the first time.
by LaRobaNacas January 20, 2008
1 more definition
Inhabitant of the greatest co-op house the Berkeley Student Cooperative has ever seen, Andres Castro Arms. Those who have struck the perfect balance between having a beautiful house and engaging in all-out pirate insanity.
Davisaur: Who just pranked Davis house?

Castronaut: No idea, must have been Wolf! (with excellent poker face)

~~some moments later~~

Castronaut 1: Good job pranking Davis with us last night, man.

Castronaut 2: You too man. Let's head to The Loth and sauna it up.
by golden130 March 13, 2011

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