'kimochi' (気持ち) is a Japanese word meaning 'feeling', 'mood' or 'sensation'.
A good feeling could be 'kimochi ii' (気持ちいい) and a bad feeling 'kimochi warui' (気持ち悪い).
1) This word has been widely disseminated among
American otaku due to its prolific use in hentai
anime/games, where it is usually translated as 'It feels good' or 'It's good'.
Some romanizations spell it 'kimouchi'.
Antonym: Itai (painful)
2) Used to express the sentiment that an unexpected gift was thoughtful, kind, and given without obligation.
1) While being sexually stimulated: "Kimochi ii!"
2) A child leaves a basket of
cookies on her grandomother's
porch; the grandmother might comment to her
friend later that it was 'kimochi'.