The phrase has a couple of meanings depending on the context in which it is used.
1. It can be used to say a place is packed with people.
“Zwakala se bofile.” – “Come its packed.”
2. It can also be used to refer to making sure.
“Security se bofile.” – “Security made sure or security is tight.”
“Pitso o se bofile squad.” -“Pitso picked a good squad or made sure with his squad selection.”
3. It can also be used to say that there are cops at a certain place.
Ehhh mabane ne se bofile mo Cnr New Road and Lever….heavy 😂😂😂
— LOL Specialist (@eye_tee_you) October 17, 2015