"Inconsistent form" means someone or something that is not performing or behaving the same way all the time, showing differences or discrepancies in their actions or results. Full definition
After leaving Manchester United on deadline day for the Gunners after many seasons of inconsistent form and a lack of regular first team football, the England forward will now be looking to eliminate any doubts in the mind of Arsenal fans whilst aiming to become the main man to spearhead their attack in the absence of new teammate Olivier Giroud. (justarsenal.com)
If this period of poor and inconsistent form continues then Liverpool may even struggle to finish in the top four and qualify for the Champions League. (anfieldindex.com)
As an indication as to Giroud's inconsistent form in front of goal it's worth noting that whilst the 28 - year - old enjoyed a mid-season run of 10 goals in 10 games, the French international then went eight games without netting, prior to then bagging a late goal in the FA Cup final against Aston Villa. (caughtoffside.com)