dash someone's hopes
take the wind out of someone's sails
spike someone's guns
immiserate
egg on
fail
tread on someone's corns
snatch someone's edges
embarrass
sell ice to Eskimos
bend to one's will
mismotivate
cheek up
sell out
cheek up to
grow cold
take the bread out of someone's mouth
outpsych
lower one's sights
zombify
cast down
burst someone's bubble
cook someone's goose
come the raw prawn
psych
rain on someone's parade
piss on someone's bonfire
shoot oneself in the foot
demotivate
sweep away
sink
tread
overkill
dishearten
acraze
malveuille
harass
smoke dope
run counter
nonsensify
frogmarch
obsess
be one's own worst enemy
pass over
stoop
disgrace
revolt
gasface
whistle down the wind
cross someone's path
nuke
bring down
misesteem
deny oneself
yank someone's chain
mindfuck
cow
cut the ground from under someone's feet
induratize