catchphrase

(mathematics) geometric mean, specifically, if the variables a, b, c satisfy the relation a:b=b:c, then b is the 幾何中項 of a and c.

optimistic

feeling good

(chiefly predicative) sick, having an urge to vomit / disgusting, repulsive / Used other than figuratively or idiomatically: see 気持ち, 悪い. ("feeling bad; in a bad mood")

fundamental, radical, basic

(competition) handicap (allowance granted or hindrance imposed)

anorak, parka

creator of media (music, video, art, etc.)

sideboob