chaser
US /ˈtʃeɪ.sɚ/
UK /ˈtʃeɪ.sɚ/

1.
a drink of a different type taken after a drink of whiskey or other strong liquor
:
•
He ordered a whiskey with a beer chaser.
•
A glass of water is a good chaser for strong spirits.
2.
a person or thing that chases
:
•
The dog was a relentless chaser of squirrels.
•
He's known as a skirt-chaser.