Collocations for flap - noun

small | hinged | loose
a loose flap of skin

tent | pocket
a stylish jacket with leather cuffs and pocket flaps

undo
The officer undid the flap of his holster and drew his gun.

draw back, lift back/up, open, pull back
He drew back the tent flap.

close | lower
The pilot lowered the flaps as the aircraft came into land.

real

get in/into
Far from getting into a flap over the controversy, the government has used the media attention to its advantage.

put sb in/into
Having to cook for everyone at Christmas put his mother in a real flap.

in a ~
I''ve never seen her in a flap; she''s always so calm.

~ over
a flap over nuclear issues