painful / イタい: (slang) cringy; embarrassing

Short for 親不知歯 (oyashirazu-ba, literally “parents not-knowing tooth”). a wisdom tooth (from the likelihood that the wisdom teeth do not erupt until after no longer in daily contact with one's parents, due to moving or death)

A cliff-lined coast in Itoigawa, Niigata Prefecture, Japan / A cliff-lined coast in Shizuoka, Shizuoka Prefecture, Japan

meal / diet

have a meal, eat

pain

pain, pain, go away

in the middle of a meal (e.g. having dinner)

ouch

(idiomatic) Not caring at all, being no skin off one's nose, being of no concern at all.