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Intermediate Range Ballistic Missile.

Similar to ICBM but with smaller range .By definition, range if the range is smaller then 4000 mi, it's an IRBM.

"Ballistic" in this case means that the missile does not depend on anything like a wing for lift (it may or may not have small fins, though.
The V2 was the first IRBM.
by meselfs January 13, 2005
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Sep 12 Word of the Day
Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.
A:dude, Anatidaephobia is the coolest phobia ever!
B:quack!
by blank babushka October 24, 2009
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2
"i'd rather be masturbating." mostly used to express frustration with an undesirable task.
square: hey are you going to the biochem review session?
baller: IRBM.
by aforce March 13, 2008
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