gaffer betyder på engelska

blunder [blundered, blundering, blunders]▼◼◼◼(To make a stupid mistake)
verb
[UK: ˈblʌn.də(r)] [US: ˈblʌn.dər]The boss called him out for his blunders. = Le patron l'a critiqué pour ses gaffes.

screw up▼◼◼◻(colloquial: to blunder)
verb
[UK: skruː ʌp] [US: ˈskruː ʌp]

misstep▼◼◻◻(to make an error or mistake)
verb
[UK: ˌmɪs.ˈstep] [US: ˌmɪs.ˈstep]

goof up▼(to make a mistake)
verb