The calculator screen term slang for the Shell Oil Company.
Using the keys on a calculator a child in 4th grades types in the keys .0) 710 77345, then turns the screen upside down to show his pal his display screen reading:

shelloilco.

or Shell Oil Co.

His freind tells him thats so clever, all he came up with was boob.
by Bear Dog Guardian 084 February 16, 2013
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