1919  "Gee! now I will get well," he said; "I'll beat the bug out now--I'll have heart."
1963  This flu bug has been having a hayday [sic], flitting about Discovery. . . .
2n. an idea or an obsession with an idea to do or become something.
1909  In his speech, Hanley admitted having been unduly urged into running by his friends, but also confessed to having got the bug in his head himself.
1922  ". . . when you have caught the bug for big farmin', you'll be mighty glad o' the chance to buy Fifteen. . . ."
1955  Men who have succumbed to the do-it-yourself bug have done so through other reasons than avoiding work.