cool off (
http://definr.com/cool off)
v 1: become quiet or calm, esp. after a state of agitation;
"After the fight both men need to cool off." "It took a
while after the baby was born for things to settle down
again." [syn:
calm,
calm down,
chill out, {simmer
down},
settle down,
cool it]
2: lose intensity; "His enthusiasm cooled considerably" [syn:
cool,
cool down]
3: feel less enamoured of something or somebody