It is an informal contraction:
An informal type of contraction occurs frequently in speech and writing, in which a syllable is substituted by an apostrophe and/or other mode of elision, e.g., can't for "cannot", won't for "will not". Such contractions are often either negations with not or combinations of pronouns with auxiliary verbs, e.g., I'll for "I will". At least one study has sought to analyze the category of negative informal contractions as the attachment of an inflectional suffix.
The logical connective "or" is called the disjunction of the statements R and S in the statement "R or S."
it is usually called sassy or sassed bug
the 0's and 1's are called binary.
A baby oryx is called a calf.
No they used to be called S & S :)
It´s called Land´s End ^_^
It was called the 1890's (Eighteen-nineties) It was called the 1890's (Eighteen-nineties)
Atoms that have lost or gained electron(s) are called ions. If they are positively charged (lost an electron(s)), they are called cations. If they are negatively charged (gained an electron(s), they are called anions.
A butterfly`s is called a chrysalis a moth`s is a cocoon.
People in their 80's are often referred to as octogenarians.
Law keepers from the 1800's were called Constables.
Well if the 2000-10 was called the twennies it got to be called the 9010's