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1.
Refers to any one who types in all capital letters
HELLO MY NAME Is CAPTAIN CAPS LOCK
by Zaphod Bebblebrox May 17, 2004
56 14
 
2.
Often used as a funny comment in internet forums to criticize users who post in all capital letters.
User1: HELP ME WITH PROBLEM FOOBAR
User2: Ah, captain Caps Lock and the Shift Crew been here...
by Phirius May 07, 2008
47 11