upset the applecart
To disorganize or spoil something, especially an established arrangement or plan.
“There are three reasons,” Trent answered. “First, he may find his way to England and upset the applecart; […]”
VERBS
appear, be, feel, look, seem, sound
become, get
She became upset when she realized her flight had been cancelled.
remain
leave sb, make sb
His comments made her so upset that she refused to speak to him for days.
ADV
badly, bitterly, deeply, desperately, dreadfully, extremely, genuinely, greatly, particularly, profoundly, really, seriously, terribly, very
My friend was genuinely upset when she found out about the cancelled concert.
thoroughly | a bit, a little, pretty, quite, rather | clearly, obviously, visibly
PREP
about
He was upset about missing his flight to visit his family.
at
She felt upset at the cancellation of the concert she had been looking forward to.
by
My sister was upset by the rude comments her classmates made online.
with
My dad was upset with me for losing my house keys again.
ADJ
big, major | minor | emotional
VERB + UPSET
have
The team had a terrible upset in the final match when their best player got injured.
cause
ADV
badly, deeply, really, terribly
easily
My little brother gets easily upset when he doesn't win at video games.
VERB + UPSET
not mean to, not want to, not wish to
I didn't mean to upset her when I cancelled our plans at the last minute.
be likely to
The new school rules are likely to upset most of the students.