Expletive /(?)/
Ex·ple·tive
Expletive
a.
-
Filling up; hence, added merely for the purpose of filling up; superfluous.
Expletive phrases to plump his speech.
Expletive
n.
-
A word, letter, or syllable not necessary to the sense, but inserted to fill a vacancy; an oath.
While explectives their feeble aid to join, And ten low words oft creep in one dull line.