I saw some in the hardware store a few years ago, and it said Duck Tape. I assumed that was just a knockoff 'brand' name (because it was some pretty crappy tape).
I have called it Duct Tape all my life.
HOWEVER, the truth is that there is a specific 'type' called DUCT TAPE and it is designed just for air ducts.
However, the ORIGINAL tape was invented for use by the Military, and it was called DUCK TAPE. What you can buy at the hardware store NOW is (imho) neither DUCT TAPE nor DUCK TAPE. However, that is not the issue.
Bottom line: DUCK TAPE is the original and proper name for that particular type of tape.
I wouldn't have believed it if I hadn't researched it.
No military types on this thread? You all failed to mention good old 100 mph tape:
http://www.goruck.com/en/100-mph-mil-spec-duct-tape#.VD4G0xY1DBQ
I had always assumed it was called DUCT TAPE, the original, the only, simply because it described exactly what the tape was for. To secure ducts. Any mere mention of having it called DUCK TAPE would have me ridicule anyone who could be as dumb and stupid as that. Well, I have been humbled before but never to this extent and now I feel divine, totally cleansed, free of sin and unholiness. And so I am ready to announce my candidacy for local Community Organizer.