The clip went click
Tried to detect, but did not detect perfect
So I creep on that ass, pops him and drops him

from Dr. Dre (Ft. Snoop Dogg) – 187 (Deep Cover Remix) Lyrics on Rap Genius

Meaning

Snoop loaded up his Glock again and was ready to go, but his aim was shaky so he had trouble hitting him.

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