ASTC is an acronym for
Normally used to remember the sine/cosine/tangent rule when corresponding with angles. From the first to fourth quadrants respectively, ASTC also refers to
However, it is also used among students to express their hatred/contempt of their oft-crazy science teachers.
*A uploads a picture of chem paper's bad joke on FB*
B- "ugh she's so LAME i hate her lessons!"
C- "ASTC, lol."