THESAURUS
trigger happy
aggressive, antagonistic, bashful, battling, bellicose, belligerent, bloodthirsty, bloody, bloody-minded, chauvinist, chauvinistic, combative, contentious, cowardly, diffident, enemy, fearful, fearing, fearsome, ferocious, fierce, fighting, full of fight, goosy, hawkish, hostile, in fear, inimical, jingo, jingoish, jingoist, jingoistic, jumpy, martial, militant, militaristic, military, mousy, nervous, offensive, pugnacious, quarrelsome, rabbity, saber-rattling, sanguinary, sanguineous, savage, scary, scrappy, shaky, shivery, shrinking, shy, skittery, skittish, soldierlike, soldierly, startlish, timid, timorous, trembling, tremulous, trepidant, truculent, unfriendly, unpacific, unpeaceable, unpeaceful, warlike, warmongering, warring