It looks like The Simpsons also gave it the commonly accepted meaning.

Etymology 1
1954. Onomatopoeic.

Verb

1. (onomatopoeia) To make an oinking sound.
2. (colloquial) To hop or bounce.
3. nonce word for an action that impacts on something, especially if it is sudden.
4. (slang) To kill.

Noun

yoink (plural yoinks)

1. (slang) An ordinary person with nothing to recommend them.

Interjection

yoink

1. (colloquial) Used for emphasis or to express that one is impressed.

Etymology 2

Coined by writer George Meyer for the TV show The Simpsons; perhaps from yank, or imitative of the sound effect (a quick upward slide on a violin) that accompanies something being snatched in classic comedies.

Interjection

yoink

1. (colloquial) Onomatopoeic, accompanying or describing a yank, swipe, or snatch.

Verb

yoink (third-person singular simple present yoinks, present participle yoinking, simple past and past participle yoinked)

1. (colloquial) To yank or snatch.
2. (colloquial) To steal.
3. (colloquial) To take or win (something that others want).

https://en.wiktionary.org/wiki/yoink