Ramping; leaping; springing; rearing upon the hind legs; hence, raging; furious.

Rising with fore paws in the air as if attacking; -- said of a beast of prey, especially a lion. The right fore leg and right hind leg should be raised higher than the left.

( of a lion etc. ) Rearing up on its left hind leg.

Widespread; extending unchecked; unrestrained.

unrestrained and violent; "rampant aggression"

a plant that is rampant grows and spreads uncontrollably

indiscriminate near-uncontrolled sexual behavior randy or raunchy: strong sexual desire/arousal and indiscriminate sexual behavior

Occurring without restraint and frequently, widely, or menacingly; rife: a rampant epidemic;

Ascending; climbing; rank in growth; exuberant.

an arch or vault which springs from one level of support and rests at the other side on a higher level.