adjective/ku.zy d(ə) fil blɑ̃/
blatantly obvious, poorly concealed (e.g a lie, or the plot of a story)
“L’intrigue de ce film était vraiment cousue de fil blanc.” — The plot of that movie was as predictable as ever.
Literally, “sewn with white thread”. From the use of white thread to sew pieces of cloth together before the final sewing.