The phrase "indifferent performance" means that someone has shown a lack of interest or effort in their work or task, resulting in a mediocre or below-average performance. Full definition
Who would have thought that, despite some of our relatively indifferent performances, we would be sitting above last season's champions at the half - way point in the season? (westhamway.net)
Between highly forgettable vanity projects, which he's been churning out at a torrid clip, Franco has essentially been playing an indifferent actor giving indifferent performances in terrible big - studio movies like «Oz the Great and Powerful» and «The Interview.» (nypost.com)
Win lose or draw, good bad or indifferent performance against Sunderland sat I want Wenger out ASAP. (justarsenal.com)