[on the brink of] {adv. phr.} Facing a new event that's […]

[on the cheap] {adv. phr.} Inexpensively; on a tight budget. * […]

[on the contrary] {adv. phr.} Exactly the opposite; rather; instead. * […]

[on the cuff] {adj.} or {adv. phr.}, {informal} Agreeing to pay […]

[on the dole] {adv. phr.} Drawing unemployment benefits. * /When Jim […]

[on the dot] also [on the button] {adv. phr.}, {informal} Exactly […]

[on the double!] {adv. phr.} Hurry up! * /"Let's go! On […]

[on the face of it] {adv. phr.} Apparently; as it seems. […]

[on the fence] {adj.} or {adv. phr.} Not able, or not […]

[on the fly] (1) {adv. phr.} 1. While in the air; […]