frequent hitter

https://doi.org/10.1351/goldbook.12661
Structural feature that regularly results in a positive response in a variety of high-throughput or primary screens.
Note: Such compounds often exert their actions through nonspecific mechanisms and are therefore unreliable leads.
Source:
PAC, 2013, 85, 1725. (Glossary of terms used in medicinal chemistry. Part II (IUPAC Recommendations 2013)) on page 1735 [Terms] [Paper]