for ‧ get ‧ ta ‧ ble /fəˈɡetəb ə l $ fər-/ BrE AmE adjective
[ Word Family: adverb : ↑ forgetfully , ↑ unforgettably ; adjective : ↑ forgetful , ↑ forgettable ≠ ↑ unforgettable ; verb : ↑ forget ; noun : ↑ forgetfulness ]
not very interesting or good – often used humorously OPP unforgettable :
He’d had a role in one or two forgettable movies.