IPA: /ˈflɪŋər/
KK: /ˈflɪŋər/
A person who throws something with force or enthusiasm.
The flinger tossed the ball across the field with great energy.
Flinger → It is formed from "fling" (from Middle English *flingen*, meaning to throw or toss) and "-er" (meaning a person who). A flinger is a person who throws or tosses something.
Think of someone who 'throws' ('fling') something — the '-er' just means a person. A flinger is someone who throws.