ftk

"for the kids"
a slogan utilized by many camps and counselors when demonstrating that everything they do is to make the kids happy

"Yesterday, a camper woke me up at 4 in the morning to get a drink of water"
"Well, its ftk"

testitis

"test-eye-tiss"
when you have a test so you fake sick and miss the day

Teacher: "where's jack"
Student: "oh, he's sick"
Student 2: "yeah, he's got testitis"