lose one's cool
to lose one's temper, to become angry
The saleswoman lost her cool during a meeting with the chief supplier.
Ten Ball Billiards
10 Ball Billiards Rules
There are two distinct versions of 10 ball billiard rules; a snooker version, and a billiard and pool version. This version of ten ball billiard rules is the version that is played with a regular billiard or pool table with a standard set of pool balls, 1 15, solids and stripes. You can view the other version of Ten Ball snooker rules here.