A three-tight end, no wide receiver formation used in short yardage situations In many cases, an extra offensive linemen will in fact be used instead of a tight end
Jumbo means very large; used mainly in advertising and in the names of products. a jumbo box of tissues. = giant
A jumbo or a jumbo jet is a very large jet aircraft that can carry several hundred passengers. a British Airways jumbo. larger than other things of the same type (Jumbo, name of a very large elephant put on show in London and the U.S. in the 19th century, perhaps from mumbo-jumbo)
A puzzle with a bigger grid and many more clues than usual, often published on special occasions such as Christmas or Easter A common size for a jumbo blocked grid is 27x27 and this would typically have 70 to 80 clues Here is an example Jumbo
Jumbo loans refer to those loan amounts outside of the "conforming" range or, above $227,150