똥침

last week in one of my classes, a student (christopher) said 'fuck you' to another student (francis). they are friends and it was no suprise as they are always cutting up. these boys are probably 13-15 years old.
i said 'hey don't let me hear you say that again in my class.'
christopher said 'ok, sorry.'
i said 'if i hear it again, francis will have my permission to 똥침 you.'
(dong chim: dong=shit, chim=acupuncture; so acupuncture in the ass) the entire class busted out laughing.
you take your hands and put them together like a 007 gun and poke someone in the ass and say 똥침! it's more common with the younger kids, but they all find it funny.

beyond that school is super busy right now, as it's intensives. it's a lot of work, both inside and outside of the classroom, but everything is good.