- (directed at a horse) move on!, go faster!
direction to a horse — see giddyup
- (slang) to encourage
- (slang) to excite in order to try to achieve a desired result
- "US fund manager Eric Knight has a fearful reputation as a shareholder activist, geeing up underperforming managements at Royal Dutch Shell and Suez." – HSBC: activist pounces, The Week, 15 September 2007, 631, 43.