[nothing to it] {adj. phr.} Presenting no serious challenge; easily accomplished. […]

[number one] (2) {adj. phr.} 1. Of first rank or importance; […]

[nutty as a fruitcake] {adj. phr.}, {slang} Very crazy; entirely mad. […]

[of a piece] {adj. phr.} Of the same kind; in line. […]

[of age] {adj. phr.} 1a. Old enough to be allowed to […]

[of old] (1) {adj. phr.} Of ancient times; of long ago. […]

[of one's life] {adj. phr.} The best or worst; greatest. - […]

[of service] {adj. phr.} Valuable as a source of aid; helpful; […]

[of sorts] or [of a sort] {adj. phr.} Not especially good; […]

[of the first water] {adj. phr.}, {informal} Of the finest quality; […]