1. boink - Noun
2. boink - Verb
(transitive, intransitive, informal) To have sexual intercourse (with); to bonk.
Max was boinking Jane in the bathroom of the bar.
(transitive, informal) To hit or strike.
(computing, slang) A real-world social gathering of computer users.
(informal) Sexual intercourse.
Max and Jane had a quick boink in the bathroom.
A sound of something hitting or bouncing off a surface, similar to plunk, but with more connotations of bounciness.
Source: en.wiktionary.org