不吐不快

to have to pour out what's on one's mind (idiom)

no; not so / (bound form) not; un-

to spit / to send out (silk from a silkworm, bolls from cotton flowers etc) / to say / to pour out (one's grievances)

to vomit / to throw up

unhappy / in low spirits / (of a knife) not sharp

rapid / quick / speed / rate / soon / almost / to make haste / clever / sharp (of knives or wits) / forthright / plainspoken / gratified / pleased / pleasant