Walk into the Corrupt Practices Investigation Bureau (CPIB) office and visitors will see Lim's Kopi sign on the door of one of the meeting rooms.
The graft-busters, inspired by Mr Brown's blog post calling their bureau the hardest working agency this year, made the sign for fun.
Lim kopi (Hokkien for drink coffee) is a euphemism for being called up by the CPIB for questioning.
To mark its 60th anniversary, CPIB, which says it is the oldest anti-corruption agency in the world, also made three video clips explaining what corruption is and correct some misconceptions.
One of them was shown at Golden Village cinemas at the screenings of the latest Batman movie.