haha, in NS, there's this 'excuse' term that people use to
literally excuse themselves from doing things. Excuse grass means
they cannot go near grass, possibly due to allergies (it's true, my
friend is allergic to grass).
Other examples like excuse PT kit, etc. In the mr brown show, mr
brown said: "you excuse bang bang ah?" means that guy don't have to
shout bang bang issit? 
