What does OOMF mean on TikTok?

This image appears in the gallery:
TikTok Slang: A Complete Guide To The Meanings Behind Each Phrase

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 

10. 100 images

See the full gallery: TikTok Slang: A Complete Guide To The Meanings Behind Each Phrase