"Drop a Gem on 'em" is a promotional single for Mobb Deep's Hell on Earth album. The song contains a sample from "Can't Help but Love You" by The Whispers.

The song is a diss to West Coast rapper Tupac Shakur's feud with the group. It was recorded while Shakur was alive but was released on the album after his death. The cryptic lyrics in the song caused controversy after Tupac's murder. Lines such as "I had the whole New York state aiming at your face/At the gate, bottom line off top soon as you came through/Shot through, don't even know the half of my crew" and "Think fast or get reminded of robberies in Manhattan, you know what happened/ 60 G's worth of gun-clappin'" are some of the "threats" contained in the song, by making reference to the 1994 Quad Recordings Studio Shooting.

Following Shakur's death shortly after the song's release, Mobb Deep pulled "Drop a Gem on 'em" from radio airplay out of respect for Shakur and his family: plans to record a music video for the song, intended to further disparage Shakur, were also cancelled.

...
Wikipedia