to have a lump in one's throat, stomach full of food / (idiomatic) to be emotionally moved

a badge, an insignia worn on the chest

(idiomatic) to throw out one's chest; to be puffed up with pride

(Internet slang) Short for 胸が熱くなる.

(idiomatic) a more powerful person partners with a less powerful person, such as for practicing

(idiomatic) to be unsettled, to be uneasy

to have a lump in one's throat, stomach full of food / (idiomatic) to be emotionally moved

(anatomy, uncommon, dated) cephalothorax

(slang) an unexpected (intentional or accidental) exposure of a woman's breasts

(anatomy) a sternocleidomastoid muscle