have the bug

have the bug

To suddenly be excited by or very interested in something (which can be specified between "the" and "bug"). Molly's really enjoying rehearsing for the school play—it seems she has the acting bug.
See also: bug, have
Farlex Dictionary of Idioms.

have (or be bitten by) the bug

develop a sudden strong enthusiasm for something.
See also: bug, have
Farlex Partner Idioms Dictionary

be bitten by/have the ˈbug

(informal) have a sudden strong interest in or enthusiasm for something: My mum was never really interested in going abroad until she went to America last year. Now she’s been bitten by the travel bug and hates staying at home!
See also: bitten, bug, by, have
Farlex Partner Idioms Dictionary
See also:
  • be bitten by the bug
  • be bitten by/have the bug
  • bitten
  • define
  • define (something) as (something)
  • define as
  • X factor
  • in rehearsal
  • trial run
  • a trial run