rampant
adjective
1. (of a person) unrestrained and violent
- rampant aggression
Similar word(s): uncontrolled
2. standing on the left hind leg with forelegs elevated and head (usually in profile)
- a lion rampant
Similar word(s): erect, upright, vertical, rearing
3. widespread, common (especially of unpleasant or harmful things).
- a rampant growth of weeds